Q: Is 21,480 a Prime Number?
A: No, 21,480 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 21480 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 179 358 537 716 895 1,074 1,432 1,790 2,148 2,685 3,580 4,296 5,370 7,160 10,740 and 21,480, with no remainder.
Since 21,480 cannot be divided by just 1 and 21,480, it is not a prime number.