Q: Is 21,360 a Prime Number?
A: No, 21,360 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 21360 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 89 120 178 240 267 356 445 534 712 890 1,068 1,335 1,424 1,780 2,136 2,670 3,560 4,272 5,340 7,120 10,680 and 21,360, with no remainder.
Since 21,360 cannot be divided by just 1 and 21,360, it is not a prime number.