Q: Is 21,372 a Composite Number?
A: Yes, 21,372 is a composite number.
The number 21,372 can be evenly divided by 1 2 3 4 6 12 13 26 39 52 78 137 156 274 411 548 822 1,644 1,781 3,562 5,343 7,124 10,686 and 21,372, with no remainder.
Since 21,372 cannot be divided by just 1 and 21,372, it is a composite number.