Q: Is 21,788 a Composite Number?
A: Yes, 21,788 is a composite number.
The number 21,788 can be evenly divided by 1 2 4 13 26 52 419 838 1,676 5,447 10,894 and 21,788, with no remainder.
Since 21,788 cannot be divided by just 1 and 21,788, it is a composite number.