Q: Is 21,688 a Composite Number?
A: Yes, 21,688 is a composite number.
The number 21,688 can be evenly divided by 1 2 4 8 2,711 5,422 10,844 and 21,688, with no remainder.
Since 21,688 cannot be divided by just 1 and 21,688, it is a composite number.