diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objc/ObjCCodeGenerator.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objc/ObjCCodeGenerator.kt
index 04706ab553b..ded0d2929b4 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objc/ObjCCodeGenerator.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objc/ObjCCodeGenerator.kt
@@ -20,7 +20,7 @@ internal open class ObjCCodeGenerator(val codegen: CodeGenerator) {
         return load(selectorRef.llvm)
     }
 
-    fun FunctionGenerationContext.genGetSystemClass(name: String): LLVMValueRef {
+    fun FunctionGenerationContext.genGetLinkedClass(name: String): LLVMValueRef {
         val classRef = dataGenerator.genClassRef(name)
         return load(classRef.llvm)
     }
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objcexport/ObjCExportCodeGenerator.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objcexport/ObjCExportCodeGenerator.kt
index 001d71c7707..bbf9d236794 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objcexport/ObjCExportCodeGenerator.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/objcexport/ObjCExportCodeGenerator.kt
@@ -169,6 +169,9 @@ internal class ObjCExportCodeGenerator(
             dataGenerator.emitEmptyClass(namer.getPackageName(fqName), namer.kotlinAnyName)
         }
 
+        NSNumberKind.values().mapNotNull { it.mappedKotlinClassId }.forEach {
+            dataGenerator.exportClass("Kotlin${it.shortClassName}")
+        }
         dataGenerator.exportClass("KotlinMutableSet")
         dataGenerator.exportClass("KotlinMutableDictionary")
 
@@ -345,7 +348,7 @@ private fun ObjCExportCodeGenerator.emitBoxConverters() {
     emitBoxConverter(irBuiltIns.shortClass, ObjCValueType.SHORT, "numberWithShort:")
     emitBoxConverter(irBuiltIns.intClass, ObjCValueType.INT, "numberWithInt:")
     emitBoxConverter(irBuiltIns.longClass, ObjCValueType.LONG_LONG, "numberWithLongLong:")
-    emitBoxConverter(symbols.uByte, ObjCValueType.UNSIGNED_CHAR, "numberWithUnsignedChar")
+    emitBoxConverter(symbols.uByte, ObjCValueType.UNSIGNED_CHAR, "numberWithUnsignedChar:")
     emitBoxConverter(symbols.uShort, ObjCValueType.UNSIGNED_SHORT, "numberWithUnsignedShort:")
     emitBoxConverter(symbols.uInt, ObjCValueType.UNSIGNED_INT, "numberWithUnsignedInt:")
     emitBoxConverter(symbols.uLong, ObjCValueType.UNSIGNED_LONG_LONG, "numberWithUnsignedLongLong:")
@@ -371,8 +374,8 @@ private fun ObjCExportCodeGenerator.emitBoxConverter(
 
         val value = kotlinToObjC(kotlinValue, objCValueType)
 
-        val nsNumber = genGetSystemClass("NSNumber")
-        ret(genSendMessage(int8TypePtr, nsNumber, nsNumberFactorySelector, value))
+        val nsNumberSubclass = genGetLinkedClass("Kotlin${boxClass.name}")
+        ret(genSendMessage(int8TypePtr, nsNumberSubclass, nsNumberFactorySelector, value))
     }
 
     LLVMSetLinkage(converter, LLVMLinkage.LLVMPrivateLinkage)
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportHeaderGenerator.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportHeaderGenerator.kt
index 963437d96a5..22bea5327a9 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportHeaderGenerator.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportHeaderGenerator.kt
@@ -11,6 +11,7 @@ import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.builtins.UnsignedType
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
+import org.jetbrains.kotlin.name.ClassId
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.constants.ArrayValue
@@ -44,6 +45,16 @@ abstract class ObjCExportHeaderGenerator(
     internal val generatedClasses = mutableSetOf<ClassDescriptor>()
     internal val topLevel = mutableMapOf<FqName, MutableList<CallableMemberDescriptor>>()
 
+    private val mappedToNSNumber: List<ClassDescriptor> = with(builtIns) {
+        val result = mutableListOf(boolean, byte, short, int, long, float, double)
+
+        UnsignedType.values().mapTo(result) { unsignedType ->
+            moduleDescriptor.findClassAcrossModuleDependencies(unsignedType.classId)!!
+        }
+
+        result
+    }
+
     private val customTypeMappers: Map<ClassDescriptor, CustomTypeMapper> = with(builtIns) {
         val result = mutableListOf<CustomTypeMapper>()
 
@@ -56,16 +67,13 @@ abstract class ObjCExportHeaderGenerator(
         result += CustomTypeMapper.Collection(generator, map, "NSDictionary")
         result += CustomTypeMapper.Collection(generator, mutableMap, namer.mutableMapName)
 
-        for (descriptor in listOf(boolean, byte, short, int, long, float, double)) {
-            // TODO: Kotlin code doesn't have any checkcasts on unboxing,
-            // so it is possible that it expects boxed number of other type and unboxes it incorrectly.
+        NSNumberKind.values().forEach {
             // TODO: NSNumber seem to have different equality semantics.
-            result += CustomTypeMapper.Simple(descriptor, "NSNumber")
-        }
+            if (it.mappedKotlinClassId != null) {
+                val descriptor = moduleDescriptor.findClassAcrossModuleDependencies(it.mappedKotlinClassId)!!
+                result += CustomTypeMapper.Simple(descriptor, namer.numberBoxName(descriptor))
+            }
 
-        for (unsignedType in UnsignedType.values()) {
-            val descriptor = moduleDescriptor.findClassAcrossModuleDependencies(unsignedType.classId)!!
-            result += CustomTypeMapper.Simple(descriptor, "NSNumber")
         }
 
         result += CustomTypeMapper.Simple(string, "NSString")
@@ -121,7 +129,7 @@ abstract class ObjCExportHeaderGenerator(
                 namer.mutableSetName,
                 generics = listOf("ObjectType"),
                 superClass = "NSMutableSet<ObjectType>",
-                attributes = listOf("objc_runtime_name(\"KotlinMutableSet\")")
+                attributes = listOf(objcRuntimeNameAttribute("KotlinMutableSet"))
         ))
 
         // TODO: only if appears
@@ -129,13 +137,15 @@ abstract class ObjCExportHeaderGenerator(
                 namer.mutableMapName,
                 generics = listOf("KeyType", "ObjectType"),
                 superClass = "NSMutableDictionary<KeyType, ObjectType>",
-                attributes = listOf("objc_runtime_name(\"KotlinMutableDictionary\")")
+                attributes = listOf(objcRuntimeNameAttribute("KotlinMutableDictionary"))
         ))
 
         stubs.add(ObjCInterface("NSError", categoryName = "NSErrorKotlinException", members = buildMembers {
             +ObjCProperty("kotlinException", null, ObjCNullableReferenceType(ObjCIdType), listOf("readonly"))
         }))
 
+        genKotlinNumbers()
+
         val packageFragments = moduleDescriptor.getPackageFragments()
 
         packageFragments.forEach { packageFragment ->
@@ -195,6 +205,67 @@ abstract class ObjCExportHeaderGenerator(
         return stubs
     }
 
+    private fun genKotlinNumbers() {
+        val members = buildMembers {
+            NSNumberKind.values().forEach {
+                +nsNumberFactory(it, listOf("unavailable"))
+            }
+            NSNumberKind.values().forEach {
+                +nsNumberInit(it, listOf("unavailable"))
+            }
+        }
+        stubs.add(ObjCInterface(
+                namer.kotlinNumberName,
+                superClass = "NSNumber",
+                members = members,
+                attributes = listOf(objcRuntimeNameAttribute("KotlinNumber"))
+        ))
+
+        NSNumberKind.values().forEach {
+            if (it.mappedKotlinClassId != null) {
+                stubs += genKotlinNumber(it.mappedKotlinClassId, it)
+            }
+        }
+    }
+
+    private fun genKotlinNumber(kotlinClassId: ClassId, kind: NSNumberKind): ObjCInterface {
+        val descriptor = moduleDescriptor.findClassAcrossModuleDependencies(kotlinClassId)!!
+        val name = namer.numberBoxName(descriptor)
+
+        val members = buildMembers {
+            +nsNumberFactory(kind)
+            +nsNumberInit(kind)
+        }
+        return ObjCInterface(
+                name,
+                superClass = namer.kotlinNumberName,
+                members = members,
+                attributes = listOf(objcRuntimeNameAttribute("Kotlin${kotlinClassId.shortClassName}"))
+        )
+    }
+
+    private fun nsNumberInit(kind: NSNumberKind, attributes: List<String> = emptyList()): ObjCMethod {
+        return ObjCMethod(
+                null,
+                false,
+                ObjCInstanceType,
+                listOf(kind.factorySelector),
+                listOf(ObjCParameter("value", null, kind.objCType)),
+                attributes
+        )
+    }
+
+    private fun nsNumberFactory(kind: NSNumberKind, attributes: List<String> = emptyList()): ObjCMethod {
+        return ObjCMethod(
+                null,
+                true,
+                ObjCInstanceType,
+                listOf(kind.initSelector),
+                listOf(ObjCParameter("value", null, kind.objCType)),
+                attributes
+        )
+    }
+
     private fun translateClassName(descriptor: ClassDescriptor): String = classOrInterfaceToName.getOrPut(descriptor) {
         assert(mapper.shouldBeExposed(descriptor))
         val forwardDeclarations = if (descriptor.isInterface) protocolForwardDeclarations else classForwardDeclarations
@@ -549,6 +620,7 @@ abstract class ObjCExportHeaderGenerator(
     }
 
     private fun swiftNameAttribute(swiftName: String) = "swift_name(\"$swiftName\")"
+    private fun objcRuntimeNameAttribute(name: String) = "objc_runtime_name(\"$name\")"
 
     private val methodsWithThrowAnnotationConsidered = mutableSetOf<FunctionDescriptor>()
 
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportMapper.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportMapper.kt
index 4bc2174b8d4..b11fa3e8205 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportMapper.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportMapper.kt
@@ -12,8 +12,11 @@ import org.jetbrains.kotlin.backend.konan.descriptors.allOverriddenDescriptors
 import org.jetbrains.kotlin.backend.konan.descriptors.isArray
 import org.jetbrains.kotlin.backend.konan.descriptors.isInterface
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
+import org.jetbrains.kotlin.builtins.PrimitiveType
 import org.jetbrains.kotlin.builtins.UnsignedType
 import org.jetbrains.kotlin.descriptors.*
+import org.jetbrains.kotlin.name.ClassId
+import org.jetbrains.kotlin.name.FqNameUnsafe
 import org.jetbrains.kotlin.resolve.descriptorUtil.*
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.TypeUtils
@@ -215,3 +218,49 @@ internal fun ObjCExportMapper.bridgePropertyType(descriptor: PropertyDescriptor)
 
     return bridgeType(descriptor.type)
 }
+
+internal enum class NSNumberKind(val mappedKotlinClassId: ClassId?, val objCType: ObjCType) {
+    CHAR(PrimitiveType.BYTE, "char"),
+    UNSIGNED_CHAR(UnsignedType.UBYTE, "unsigned char"),
+    SHORT(PrimitiveType.SHORT, "short"),
+    UNSIGNED_SHORT(UnsignedType.USHORT, "unsigned short"),
+    INT(PrimitiveType.INT, "int"),
+    UNSIGNED_INT(UnsignedType.UINT, "unsigned int"),
+    LONG("long"),
+    UNSIGNED_LONG("unsigned long"),
+    LONG_LONG(PrimitiveType.LONG, "long long"),
+    UNSIGNED_LONG_LONG(UnsignedType.ULONG, "unsigned long long"),
+    FLOAT(PrimitiveType.FLOAT, "float"),
+    DOUBLE(PrimitiveType.DOUBLE, "double"),
+    BOOL(PrimitiveType.BOOLEAN, "BOOL"),
+    INTEGER("NSInteger"),
+    UNSIGNED_INTEGER("NSUInteger")
+
+    ;
+
+    // UNSIGNED_SHORT -> unsignedShort
+    private val kindName = this.name.split('_')
+            .joinToString("") { it.toLowerCase().capitalize() }.decapitalize()
+
+
+    val valueSelector = kindName // unsignedShort
+    val initSelector = "initWith${kindName.capitalize()}:" // initWithUnsignedShort:
+    val factorySelector = "numberWith${kindName.capitalize()}:" // numberWithUnsignedShort:
+
+    constructor(
+            mappedKotlinClassId: ClassId?,
+            objCPrimitiveTypeName: String
+    ) : this(mappedKotlinClassId, ObjCPrimitiveType(objCPrimitiveTypeName))
+
+    constructor(
+            primitiveType: PrimitiveType,
+            objCPrimitiveTypeName: String
+    ) : this(ClassId.topLevel(primitiveType.typeFqName), objCPrimitiveTypeName)
+
+    constructor(
+            unsignedType: UnsignedType,
+            objCPrimitiveTypeName: String
+    ) : this(unsignedType.classId, objCPrimitiveTypeName)
+
+    constructor(objCPrimitiveTypeName: String) : this(null, ObjCPrimitiveType(objCPrimitiveTypeName))
+}
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportNamer.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportNamer.kt
index 6a595efc936..cae6561a113 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportNamer.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/objcexport/ObjCExportNamer.kt
@@ -29,6 +29,9 @@ internal class ObjCExportNamer(val moduleDescriptor: ModuleDescriptor,
     val mutableSetName = "${topLevelNamePrefix}MutableSet"
     val mutableMapName = "${topLevelNamePrefix}MutableDictionary"
 
+    fun numberBoxName(descriptor: ClassDescriptor): String = "$topLevelNamePrefix${descriptor.name.asString()}"
+    val kotlinNumberName = "${topLevelNamePrefix}Number"
+
     private val methodSelectors = object : Mapping<FunctionDescriptor, String>() {
 
         // Try to avoid clashing with critical NSObject instance methods:
diff --git a/backend.native/tests/framework/stdlib/stdlib.swift b/backend.native/tests/framework/stdlib/stdlib.swift
index b6fea6af624..01c42714189 100644
--- a/backend.native/tests/framework/stdlib/stdlib.swift
+++ b/backend.native/tests/framework/stdlib/stdlib.swift
@@ -134,7 +134,7 @@ class StdlibTests : TestProvider {
             print("MAP: \(k) - \(v)")
         }
 
-        var smd = StdlibMutableDictionary<NSString, NSNumber>()
+        var smd = StdlibMutableDictionary<NSString, StdlibInt>()
         smd.setObject(333, forKey: "333" as NSString)
         try assertEquals(actual: smd.object(forKey: "333" as NSString) as! Int, expected: 333, "Add element to dict")
         
diff --git a/backend.native/tests/framework/values/values.kt b/backend.native/tests/framework/values/values.kt
index e6f5b068256..b4728be5b22 100644
--- a/backend.native/tests/framework/values/values.kt
+++ b/backend.native/tests/framework/values/values.kt
@@ -32,6 +32,37 @@ val nanFloatVal: Float = Float.NaN
 val infDoubleVal: Double = Double.POSITIVE_INFINITY
 val infFloatVal: Float = Float.NEGATIVE_INFINITY
 
+private fun <T> T.toNullable(): T? = this
+
+fun box(booleanValue: Boolean) = booleanValue.toNullable()
+fun box(byteValue: Byte) = byteValue.toNullable()
+fun box(shortValue: Short) = shortValue.toNullable()
+fun box(intValue: Int) = intValue.toNullable()
+fun box(longValue: Long) = longValue.toNullable()
+fun box(uByteValue: UByte) = uByteValue.toNullable()
+fun box(uShortValue: UShort) = uShortValue.toNullable()
+fun box(uIntValue: UInt) = uIntValue.toNullable()
+fun box(uLongValue: ULong) = uLongValue.toNullable()
+fun box(floatValue: Float) = floatValue.toNullable()
+fun box(doubleValue: Double) = doubleValue.toNullable()
+
+private inline fun <reified T> ensureEquals(actual: T?, expected: T) {
+    if (actual !is T) error(T::class)
+    if (actual != expected) error(T::class)
+}
+
+fun ensureEqualBooleans(actual: Boolean?, expected: Boolean) = ensureEquals(actual, expected)
+fun ensureEqualBytes(actual: Byte?, expected: Byte) = ensureEquals(actual, expected)
+fun ensureEqualShorts(actual: Short?, expected: Short) = ensureEquals(actual, expected)
+fun ensureEqualInts(actual: Int?, expected: Int) = ensureEquals(actual, expected)
+fun ensureEqualLongs(actual: Long?, expected: Long) = ensureEquals(actual, expected)
+fun ensureEqualUBytes(actual: UByte?, expected: UByte) = ensureEquals(actual, expected)
+fun ensureEqualUShorts(actual: UShort?, expected: UShort) = ensureEquals(actual, expected)
+fun ensureEqualUInts(actual: UInt?, expected: UInt) = ensureEquals(actual, expected)
+fun ensureEqualULongs(actual: ULong?, expected: ULong) = ensureEquals(actual, expected)
+fun ensureEqualFloats(actual: Float?, expected: Float) = ensureEquals(actual, expected)
+fun ensureEqualDoubles(actual: Double?, expected: Double) = ensureEquals(actual, expected)
+
 // Boolean
 val boolVal: Boolean = true
 val boolAnyVal: Any = false
diff --git a/backend.native/tests/framework/values/values.swift b/backend.native/tests/framework/values/values.swift
index cfd7e6e6589..81ba4f2ccb2 100644
--- a/backend.native/tests/framework/values/values.swift
+++ b/backend.native/tests/framework/values/values.swift
@@ -91,6 +91,116 @@ func testDoubles() throws {
     try assertEquals(actual: Values.infFloatVal, expected: -Float.infinity, "-Inf float")
 }
 
+func testNumbers() throws {
+    try assertEquals(actual: ValuesBoolean(value: true).boolValue, expected: true)
+    try assertEquals(actual: ValuesBoolean(value: false).intValue, expected: 0)
+    try assertEquals(actual: ValuesBoolean(value: true), expected: true)
+    try assertFalse(ValuesBoolean(value: false) as! Bool)
+
+    try assertEquals(actual: ValuesByte(value: -1).int8Value, expected: -1)
+    try assertEquals(actual: ValuesByte(value: -1).int32Value, expected: -1)
+    try assertEquals(actual: ValuesByte(value: -1).doubleValue, expected: -1.0)
+    try assertEquals(actual: ValuesByte(value: -1), expected: NSNumber(value: Int64(-1)))
+    try assertFalse(ValuesByte(value: -1) == NSNumber(value: -1.5))
+    try assertEquals(actual: ValuesByte(value: -1), expected: -1)
+    try assertTrue(ValuesByte(value: -1) == -1)
+    try assertFalse(ValuesByte(value: -1) == 1)
+    try assertEquals(actual: ValuesByte(value: -1) as! Int32, expected: -1)
+
+    try assertEquals(actual: ValuesShort(value: 111).int16Value, expected: 111)
+    try assertEquals(actual: ValuesShort(value: -15) as! Int16, expected: -15)
+    try assertEquals(actual: ValuesShort(value: 47), expected: 47)
+
+    try assertEquals(actual: ValuesInt(value: 99).int32Value, expected: 99)
+    try assertEquals(actual: ValuesInt(value: -1) as! Int32, expected: -1)
+    try assertEquals(actual: ValuesInt(value: 72), expected: 72)
+
+    try assertEquals(actual: ValuesLong(value: 65).int64Value, expected: 65)
+    try assertEquals(actual: ValuesLong(value: 10000000000) as! Int64, expected: 10000000000)
+    try assertEquals(actual: ValuesLong(value: 8), expected: 8)
+
+    try assertEquals(actual: ValuesUByte(value: 17).uint8Value, expected: 17)
+    try assertEquals(actual: ValuesUByte(value: 42) as! UInt8, expected: 42)
+    try assertEquals(actual: 88, expected: ValuesUByte(value: 88))
+
+    try assertEquals(actual: ValuesUShort(value: 40000).uint16Value, expected: 40000)
+    try assertEquals(actual: ValuesUShort(value: 1) as! UInt16, expected: UInt16(1))
+    try assertEquals(actual: ValuesUShort(value: 65000), expected: 65000)
+
+    try assertEquals(actual: ValuesUInt(value: 3).uint32Value, expected: 3)
+    try assertEquals(actual: ValuesUInt(value: UInt32.max) as! UInt32, expected: UInt32.max)
+    try assertEquals(actual: ValuesUInt(value: 2), expected: 2)
+
+    try assertEquals(actual: ValuesULong(value: 55).uint64Value, expected: 55)
+    try assertEquals(actual: ValuesULong(value: 0) as! UInt64, expected: 0)
+    try assertEquals(actual: ValuesULong(value: 7), expected: 7)
+
+    try assertEquals(actual: ValuesFloat(value: 1.0).floatValue, expected: 1.0)
+    try assertEquals(actual: ValuesFloat(value: 22.0) as! Float, expected: 22)
+    try assertEquals(actual: ValuesFloat(value: 41.0), expected: 41)
+    try assertEquals(actual: ValuesFloat(value: -5.5), expected: -5.5)
+
+    try assertEquals(actual: ValuesDouble(value: 0.5).doubleValue, expected: 0.5)
+    try assertEquals(actual: ValuesDouble(value: 45.0) as! Double, expected: 45)
+    try assertEquals(actual: ValuesDouble(value: 89.0), expected: 89)
+    try assertEquals(actual: ValuesDouble(value: -3.7), expected: -3.7)
+
+    Values.ensureEqualBooleans(actual: ValuesBoolean(value: true), expected: true)
+    Values.ensureEqualBooleans(actual: false, expected: false)
+
+    Values.ensureEqualBytes(actual: ValuesByte(value: 42), expected: 42)
+    Values.ensureEqualBytes(actual: -11, expected: -11)
+
+    Values.ensureEqualShorts(actual: ValuesShort(value: 256), expected: 256)
+    Values.ensureEqualShorts(actual: -1, expected: -1)
+
+    Values.ensureEqualInts(actual: ValuesInt(value: 100000), expected: 100000)
+    Values.ensureEqualInts(actual: -7, expected: -7)
+
+    Values.ensureEqualLongs(actual: ValuesLong(value: Int64.max), expected: Int64.max)
+    Values.ensureEqualLongs(actual: 17, expected: 17)
+
+    Values.ensureEqualUBytes(actual: ValuesUByte(value: 6), expected: 6)
+    Values.ensureEqualUBytes(actual: 255, expected: 255)
+
+    Values.ensureEqualUShorts(actual: ValuesUShort(value: 300), expected: 300)
+    Values.ensureEqualUShorts(actual: 65535, expected: UInt16.max)
+
+    Values.ensureEqualUInts(actual: ValuesUInt(value: 70000), expected: 70000)
+    Values.ensureEqualUInts(actual: 48, expected: 48)
+
+    Values.ensureEqualULongs(actual: ValuesULong(value: UInt64.max), expected: UInt64.max)
+    Values.ensureEqualULongs(actual: 39, expected: 39)
+
+    Values.ensureEqualFloats(actual: ValuesFloat(value: 36.6), expected: 36.6)
+    Values.ensureEqualFloats(actual: 49.5, expected: 49.5)
+    Values.ensureEqualFloats(actual: 18, expected: 18.0)
+
+    Values.ensureEqualDoubles(actual: ValuesDouble(value: 12.34), expected: 12.34)
+    Values.ensureEqualDoubles(actual: 56.78, expected: 56.78)
+    Values.ensureEqualDoubles(actual: 3, expected: 3)
+
+    func checkBox<T: Equatable, B : NSObject>(_ value: T, _ boxFunction: (T) -> B?) throws {
+        let box = boxFunction(value)!
+        try assertEquals(actual: box as! T, expected: value)
+        print(type(of: box))
+        print(B.self)
+        try assertTrue(box.isKind(of: B.self))
+    }
+
+    try checkBox(true, Values.box)
+    try checkBox(Int8(-1), Values.box)
+    try checkBox(Int16(-2), Values.box)
+    try checkBox(Int32(-3), Values.box)
+    try checkBox(Int64(-4), Values.box)
+    try checkBox(UInt8(5), Values.box)
+    try checkBox(UInt16(6), Values.box)
+    try checkBox(UInt32(7), Values.box)
+    try checkBox(UInt64(8), Values.box)
+    try checkBox(Float(8.7), Values.box)
+    try checkBox(Double(9.4), Values.box)
+}
+
 func testLists() throws {
     let numbersList = Values.numbersList
     let gold = [1, 2, 13]
@@ -307,6 +417,7 @@ class ValuesTests : TestProvider {
             TestCase(name: "TestValues", method: withAutorelease(testVals)),
             TestCase(name: "TestVars", method: withAutorelease(testVars)),
             TestCase(name: "TestDoubles", method: withAutorelease(testDoubles)),
+            TestCase(name: "TestNumbers", method: withAutorelease(testNumbers)),
             TestCase(name: "TestLists", method: withAutorelease(testLists)),
             TestCase(name: "TestLazyValues", method: withAutorelease(testLazyVal)),
             TestCase(name: "TestDelegatedProperties", method: withAutorelease(testDelegatedProp)),
diff --git a/runtime/src/main/cpp/ObjCExportNumbers.mm b/runtime/src/main/cpp/ObjCExportNumbers.mm
new file mode 100644
index 00000000000..3795e329890
--- /dev/null
+++ b/runtime/src/main/cpp/ObjCExportNumbers.mm
@@ -0,0 +1,710 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#if KONAN_OBJC_INTEROP
+
+#import <Foundation/NSDictionary.h>
+#import <Foundation/NSError.h>
+#import <Foundation/NSException.h>
+#import <Foundation/NSString.h>
+
+#import "ObjCExport.h"
+#import "Runtime.h"
+#import "Utils.h"
+
+extern "C" {
+
+OBJ_GETTER(Kotlin_boxBoolean, KBoolean value);
+OBJ_GETTER(Kotlin_boxByte, KByte value);
+OBJ_GETTER(Kotlin_boxShort, KShort value);
+OBJ_GETTER(Kotlin_boxInt, KInt value);
+OBJ_GETTER(Kotlin_boxLong, KLong value);
+OBJ_GETTER(Kotlin_boxUByte, KUByte value);
+OBJ_GETTER(Kotlin_boxUShort, KUShort value);
+OBJ_GETTER(Kotlin_boxUInt, KUInt value);
+OBJ_GETTER(Kotlin_boxULong, KULong value);
+OBJ_GETTER(Kotlin_boxFloat, KFloat value);
+OBJ_GETTER(Kotlin_boxDouble, KDouble value);
+
+}
+
+#pragma clang diagnostic ignored "-Wobjc-designated-initializers"
+
+@interface KotlinNumber : NSNumber
+@end;
+
+[[ noreturn ]] static void incorrectNumberInitialization(KotlinNumber* self, SEL _cmd) {
+  [NSException raise:NSGenericException format:@"%@ can't be initialized with %s, use properly typed initialized",
+    NSStringFromClass([self class]), sel_getName(_cmd)];
+
+  abort();
+}
+
+[[ noreturn ]] static void incorrectNumberFactory(Class self, SEL _cmd) {
+  [NSException raise:NSGenericException format:@"%@ can't be created with %s, use properly typed factory",
+    NSStringFromClass(self), sel_getName(_cmd)];
+
+  abort();
+}
+
+@implementation KotlinNumber : NSNumber
+
+- (NSNumber *)initWithBool:(BOOL)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithChar:(char)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithShort:(short)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithInt:(int)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithInteger:(NSInteger)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithLong:(long)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithLongLong:(long long)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithUnsignedChar:(unsigned char)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithUnsignedShort:(unsigned short)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithUnsignedInt:(unsigned int)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithUnsignedInteger:(NSUInteger)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithUnsignedLong:(unsigned long)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithUnsignedLongLong:(unsigned long long)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithFloat:(float)value { incorrectNumberInitialization(self, _cmd); }
+- (NSNumber *)initWithDouble:(double)value { incorrectNumberInitialization(self, _cmd); }
+
++ (NSNumber *)numberWithBool:(BOOL)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithChar:(char)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithShort:(short)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithInt:(int)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithInteger:(NSInteger)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithLong:(long)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithLongLong:(long long)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithUnsignedChar:(unsigned char)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithUnsignedShort:(unsigned short)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithUnsignedInt:(unsigned int)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithUnsignedLong:(unsigned long)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithUnsignedInteger:(NSUInteger)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithUnsignedLongLong:(unsigned long long)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithFloat:(float)value { incorrectNumberFactory(self, _cmd); }
++ (NSNumber *)numberWithDouble:(double)value { incorrectNumberFactory(self, _cmd); }
+
+@end;
+
+/*
+The code below is generated by:
+
+
+fun main(args: Array<String>) {
+    println(genBoolean())
+    println(genInteger("Byte", "c", "char"))
+    println(genInteger("Short", "s", "short"))
+    println(genInteger("Int", "i", "int"))
+    println(genInteger("Long", "q", "long long"))
+    println(genInteger("UByte", "C", "unsigned char"))
+    println(genInteger("UShort", "S", "unsigned short"))
+    println(genInteger("UInt", "I", "unsigned int"))
+    println(genInteger("ULong", "Q", "unsigned long long"))
+    println(genFloating("Float", "f", "float"))
+    println(genFloating("Double", "d", "double"))
+}
+
+private fun genBoolean(): String = """
+@interface KotlinBoolean : KotlinNumber
+@end;
+
+@implementation KotlinBoolean {
+  BOOL value_;
+}
+
+- (instancetype)initWithBool:(BOOL)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithBool:(BOOL)value {
+  KotlinBoolean* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+- (BOOL)boolValue {
+  return value_;
+}
+
+- (char)charValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "c";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxBoolean, value_);
+}
+
+@end;
+
+""".trimIndent()
+
+private fun genInteger(
+        name: String,
+        encoding: String,
+        cType: String,
+        kind: String = getNSNumberKind(cType)
+) = """
+@interface Kotlin$name : KotlinNumber
+@end;
+
+@implementation Kotlin$name {
+  $cType value_;
+}
+
+- (instancetype)initWith${kind.capitalize()}:($cType)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWith${kind.capitalize()}:($cType)value {
+  Kotlin$name* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- ($cType)${kind}Value {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "$encoding";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_box$name, value_);
+}
+
+@end;
+
+""".trimIndent()
+
+private fun getNSNumberKind(cType: String) =
+        cType.split(' ').joinToString("") { it.capitalize() }.decapitalize()
+
+private fun genFloating(
+        name: String,
+        encoding: String,
+        cType: String,
+        kind: String = getNSNumberKind(cType)
+): String = """
+@interface Kotlin$name : KotlinNumber
+@end;
+
+@implementation Kotlin$name {
+  $cType value_;
+}
+
+- (instancetype)initWith${kind.capitalize()}:($cType)value  {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWith${kind.capitalize()}:($cType)value {
+  Kotlin$name* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+${if (cType != "double") """
+// Required to convert Swift floating literals.
+- (instancetype)initWithDouble:(double)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+""" else ""}
+- ($cType)${kind}Value {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "$encoding";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_box$name, value_);
+}
+
+@end;
+
+""".trimIndent()
+*/
+
+// TODO: consider generating it by compiler.
+
+@interface KotlinBoolean : KotlinNumber
+@end;
+
+@implementation KotlinBoolean {
+  BOOL value_;
+}
+
+- (instancetype)initWithBool:(BOOL)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithBool:(BOOL)value {
+  KotlinBoolean* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+- (BOOL)boolValue {
+  return value_;
+}
+
+- (char)charValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "c";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxBoolean, value_);
+}
+
+@end;
+
+@interface KotlinByte : KotlinNumber
+@end;
+
+@implementation KotlinByte {
+  char value_;
+}
+
+- (instancetype)initWithChar:(char)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithChar:(char)value {
+  KotlinByte* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- (char)charValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "c";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxByte, value_);
+}
+
+@end;
+
+@interface KotlinShort : KotlinNumber
+@end;
+
+@implementation KotlinShort {
+  short value_;
+}
+
+- (instancetype)initWithShort:(short)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithShort:(short)value {
+  KotlinShort* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- (short)shortValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "s";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxShort, value_);
+}
+
+@end;
+
+@interface KotlinInt : KotlinNumber
+@end;
+
+@implementation KotlinInt {
+  int value_;
+}
+
+- (instancetype)initWithInt:(int)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithInt:(int)value {
+  KotlinInt* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- (int)intValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "i";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxInt, value_);
+}
+
+@end;
+
+@interface KotlinLong : KotlinNumber
+@end;
+
+@implementation KotlinLong {
+  long long value_;
+}
+
+- (instancetype)initWithLongLong:(long long)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithLongLong:(long long)value {
+  KotlinLong* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- (long long)longLongValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "q";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxLong, value_);
+}
+
+@end;
+
+@interface KotlinUByte : KotlinNumber
+@end;
+
+@implementation KotlinUByte {
+  unsigned char value_;
+}
+
+- (instancetype)initWithUnsignedChar:(unsigned char)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithUnsignedChar:(unsigned char)value {
+  KotlinUByte* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- (unsigned char)unsignedCharValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "C";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxUByte, value_);
+}
+
+@end;
+
+@interface KotlinUShort : KotlinNumber
+@end;
+
+@implementation KotlinUShort {
+  unsigned short value_;
+}
+
+- (instancetype)initWithUnsignedShort:(unsigned short)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithUnsignedShort:(unsigned short)value {
+  KotlinUShort* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- (unsigned short)unsignedShortValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "S";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxUShort, value_);
+}
+
+@end;
+
+@interface KotlinUInt : KotlinNumber
+@end;
+
+@implementation KotlinUInt {
+  unsigned int value_;
+}
+
+- (instancetype)initWithUnsignedInt:(unsigned int)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithUnsignedInt:(unsigned int)value {
+  KotlinUInt* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- (unsigned int)unsignedIntValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "I";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxUInt, value_);
+}
+
+@end;
+
+@interface KotlinULong : KotlinNumber
+@end;
+
+@implementation KotlinULong {
+  unsigned long long value_;
+}
+
+- (instancetype)initWithUnsignedLongLong:(unsigned long long)value {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithUnsignedLongLong:(unsigned long long)value {
+  KotlinULong* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- (unsigned long long)unsignedLongLongValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "Q";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxULong, value_);
+}
+
+@end;
+
+@interface KotlinFloat : KotlinNumber
+@end;
+
+@implementation KotlinFloat {
+  float value_;
+}
+
+- (instancetype)initWithFloat:(float)value  {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithFloat:(float)value {
+  KotlinFloat* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+// Required to convert Swift floating literals.
+- (instancetype)initWithDouble:(double)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- (float)floatValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "f";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxFloat, value_);
+}
+
+@end;
+
+@interface KotlinDouble : KotlinNumber
+@end;
+
+@implementation KotlinDouble {
+  double value_;
+}
+
+- (instancetype)initWithDouble:(double)value  {
+  self = [super init];
+  value_ = value;
+  return self;
+}
+
++ (instancetype)numberWithDouble:(double)value {
+  KotlinDouble* result = [[self new] autorelease];
+  result->value_ = value;
+  return result;
+}
+
+// Required to convert Swift integer literals.
+- (instancetype)initWithInteger:(NSInteger)value {
+  self = [super init];
+  value_ = value; // TODO: check fits.
+  return self;
+}
+
+- (double)doubleValue {
+  return value_;
+}
+
+- (const char *)objCType {
+  return "d";
+}
+
+-(ObjHeader*)toKotlin:(ObjHeader**)OBJ_RESULT {
+  RETURN_RESULT_OF(Kotlin_boxDouble, value_);
+}
+
+@end;
+
+#endif // KONAN_OBJC_INTEROP
\ No newline at end of file