Q: Is 19,740 a Prime Number?
A: No, 19,740 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 19740 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 47 60 70 84 94 105 140 141 188 210 235 282 329 420 470 564 658 705 940 987 1,316 1,410 1,645 1,974 2,820 3,290 3,948 4,935 6,580 9,870 and 19,740, with no remainder.
Since 19,740 cannot be divided by just 1 and 19,740, it is not a prime number.