Q: Is 21,154,560 a Composite Number?

Why is 21,154,560 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 21,154,560 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 32 35 40 42 48 56 60 64 70 80 84 96 105 112 120 128 140 160 168 192 210 224 240 256 280 320 336 384 420 448 480 560 640 672 768 787 840 896 960 1,120 1,280 1,344 1,574 1,680 1,792 1,920 2,240 2,361 2,688 3,148 3,360 3,840 3,935 4,480 4,722 5,376 5,509 6,296 6,720 7,870 8,960 9,444 11,018 11,805 12,592 13,440 15,740 16,527 18,888 22,036 23,610 25,184 26,880 27,545 31,480 33,054 37,776 44,072 47,220 50,368 55,090 62,960 66,108 75,552 82,635 88,144 94,440 100,736 110,180 125,920 132,216 151,104 165,270 176,288 188,880 201,472 220,360 251,840 264,432 302,208 330,540 352,576 377,760 440,720 503,680 528,864 604,416 661,080 705,152 755,520 881,440 1,007,360 1,057,728 1,322,160 1,410,304 1,511,040 1,762,880 2,115,456 2,644,320 3,022,080 3,525,760 4,230,912 5,288,640 7,051,520 10,577,280 and 21,154,560, with no remainder.

Since 21,154,560 cannot be divided by just 1 and 21,154,560, 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).