Q: Is 21,690,840 a Composite Number?

Why is 21,690,840 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 21,690,840 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 20 23 24 29 30 40 46 58 60 69 87 92 115 116 120 138 145 174 184 230 232 271 276 290 345 348 435 460 542 552 580 667 690 696 813 870 920 1,084 1,160 1,334 1,355 1,380 1,626 1,740 2,001 2,168 2,668 2,710 2,760 3,252 3,335 3,480 4,002 4,065 5,336 5,420 6,233 6,504 6,670 7,859 8,004 8,130 10,005 10,840 12,466 13,340 15,718 16,008 16,260 18,699 20,010 23,577 24,932 26,680 31,165 31,436 32,520 37,398 39,295 40,020 47,154 49,864 62,330 62,872 74,796 78,590 80,040 93,495 94,308 117,885 124,660 149,592 157,180 180,757 186,990 188,616 235,770 249,320 314,360 361,514 373,980 471,540 542,271 723,028 747,960 903,785 943,080 1,084,542 1,446,056 1,807,570 2,169,084 2,711,355 3,615,140 4,338,168 5,422,710 7,230,280 10,845,420 and 21,690,840, with no remainder.

Since 21,690,840 cannot be divided by just 1 and 21,690,840, 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).