Q: Is 21,340 a Prime Number?
A: No, 21,340 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 21340 can be evenly divided by 1 2 4 5 10 11 20 22 44 55 97 110 194 220 388 485 970 1,067 1,940 2,134 4,268 5,335 10,670 and 21,340, with no remainder.
Since 21,340 cannot be divided by just 1 and 21,340, it is not a prime number.