Q: Is 19,920 a Prime Number?
A: No, 19,920 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 19920 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 83 120 166 240 249 332 415 498 664 830 996 1,245 1,328 1,660 1,992 2,490 3,320 3,984 4,980 6,640 9,960 and 19,920, with no remainder.
Since 19,920 cannot be divided by just 1 and 19,920, it is not a prime number.