Q: Is 21,987 a Composite Number?
A: Yes, 21,987 is a composite number.
The number 21,987 can be evenly divided by 1 3 7 9 21 63 349 1,047 2,443 3,141 7,329 and 21,987, with no remainder.
Since 21,987 cannot be divided by just 1 and 21,987, it is a composite number.