Q: Is 21,140 a Composite Number?
A: Yes, 21,140 is a composite number.
The number 21,140 can be evenly divided by 1 2 4 5 7 10 14 20 28 35 70 140 151 302 604 755 1,057 1,510 2,114 3,020 4,228 5,285 10,570 and 21,140, with no remainder.
Since 21,140 cannot be divided by just 1 and 21,140, it is a composite number.