As character names:

U+10A9F OLD NORTH ARABIAN NUMBER TWENTY character (𐪟)

As raw characters:

𐪟

As a string of HTML entities:

𐪟

Decoder output:

Byte number 1 is decimal 240, hex 0xF0, octal \360, binary 11110000
This is the first byte of a 4 byte sequence.

Byte number 2 is decimal 144, hex 0x90, octal \220, binary 10010000
This is continuation byte 1, expecting 2 more.

Byte number 3 is decimal 170, hex 0xAA, octal \252, binary 10101010
This is continuation byte 2, expecting 1 more.

Byte number 4 is decimal 159, hex 0x9F, octal \237, binary 10011111
This is continuation byte 3, expecting 0 more.

U+10A9F	OLD NORTH ARABIAN NUMBER TWENTY