Q: Is 21,402,960 a Composite Number?

Why is 21,402,960 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,402,960 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 240 257 347 514 694 771 1,028 1,041 1,285 1,388 1,542 1,735 2,056 2,082 2,570 2,776 3,084 3,470 3,855 4,112 4,164 5,140 5,205 5,552 6,168 6,940 7,710 8,328 10,280 10,410 12,336 13,880 15,420 16,656 20,560 20,820 27,760 30,840 41,640 61,680 83,280 89,179 178,358 267,537 356,716 445,895 535,074 713,432 891,790 1,070,148 1,337,685 1,426,864 1,783,580 2,140,296 2,675,370 3,567,160 4,280,592 5,350,740 7,134,320 10,701,480 and 21,402,960, with no remainder.

Since 21,402,960 cannot be divided by just 1 and 21,402,960, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).