-220 is an even number.
-220 is a Harshad number, which means it is divisible by the sum of its digits (2 + 2 + 0 = 4, and -220 is divisible by 4).
In binary, -220 is represented as 1111111111111111111111111111111111111111111111111111111100100100.
In hex, -220 is represented as ffffffffffffff24.