Q: Is 21,214,320 a Composite Number?

Why is 21,214,320 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 21,214,320 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 20 24 30 37 40 48 60 74 80 111 120 148 185 222 240 296 370 444 555 592 740 888 1,110 1,480 1,776 2,220 2,389 2,960 4,440 4,778 7,167 8,880 9,556 11,945 14,334 19,112 23,890 28,668 35,835 38,224 47,780 57,336 71,670 88,393 95,560 114,672 143,340 176,786 191,120 265,179 286,680 353,572 441,965 530,358 573,360 707,144 883,930 1,060,716 1,325,895 1,414,288 1,767,860 2,121,432 2,651,790 3,535,720 4,242,864 5,303,580 7,071,440 10,607,160 and 21,214,320, with no remainder.

Since 21,214,320 cannot be divided by just 1 and 21,214,320, 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).