Q: Is 21,700,380 a Composite Number?

Why is 21,700,380 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 21,700,380 can be evenly divided by 1 2 3 4 5 6 10 12 13 15 20 26 30 39 43 52 60 65 78 86 129 130 156 172 195 215 258 260 390 430 516 559 645 647 780 860 1,118 1,290 1,294 1,677 1,941 2,236 2,580 2,588 2,795 3,235 3,354 3,882 5,590 6,470 6,708 7,764 8,385 8,411 9,705 11,180 12,940 16,770 16,822 19,410 25,233 27,821 33,540 33,644 38,820 42,055 50,466 55,642 83,463 84,110 100,932 111,284 126,165 139,105 166,926 168,220 252,330 278,210 333,852 361,673 417,315 504,660 556,420 723,346 834,630 1,085,019 1,446,692 1,669,260 1,808,365 2,170,038 3,616,730 4,340,076 5,425,095 7,233,460 10,850,190 and 21,700,380, with no remainder.

Since 21,700,380 cannot be divided by just 1 and 21,700,380, 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).