Q: Is 21,664 a Composite Number?
A: Yes, 21,664 is a composite number.
The number 21,664 can be evenly divided by 1 2 4 8 16 32 677 1,354 2,708 5,416 10,832 and 21,664, with no remainder.
Since 21,664 cannot be divided by just 1 and 21,664, it is a composite number.