Q: Is 21,644 a Composite Number?
A: Yes, 21,644 is a composite number.
The number 21,644 can be evenly divided by 1 2 4 7 14 28 773 1,546 3,092 5,411 10,822 and 21,644, with no remainder.
Since 21,644 cannot be divided by just 1 and 21,644, it is a composite number.