Q: Is 21,960 a Prime Number?
A: No, 21,960 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 21960 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 61 72 90 120 122 180 183 244 305 360 366 488 549 610 732 915 1,098 1,220 1,464 1,830 2,196 2,440 2,745 3,660 4,392 5,490 7,320 10,980 and 21,960, with no remainder.
Since 21,960 cannot be divided by just 1 and 21,960, it is not a prime number.