Q: Is 21,421,140 a Composite Number?

Why is 21,421,140 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 21,421,140 can be evenly divided by 1 2 3 4 5 6 10 12 13 15 20 26 29 30 39 52 58 60 65 78 87 116 130 145 156 174 195 260 290 348 377 390 435 580 754 780 870 947 1,131 1,508 1,740 1,885 1,894 2,262 2,841 3,770 3,788 4,524 4,735 5,655 5,682 7,540 9,470 11,310 11,364 12,311 14,205 18,940 22,620 24,622 27,463 28,410 36,933 49,244 54,926 56,820 61,555 73,866 82,389 109,852 123,110 137,315 147,732 164,778 184,665 246,220 274,630 329,556 357,019 369,330 411,945 549,260 714,038 738,660 823,890 1,071,057 1,428,076 1,647,780 1,785,095 2,142,114 3,570,190 4,284,228 5,355,285 7,140,380 10,710,570 and 21,421,140, with no remainder.

Since 21,421,140 cannot be divided by just 1 and 21,421,140, 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).