Q: Is 20,405,560 a Composite Number?

Why is 20,405,560 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 20,405,560 can be evenly divided by 1 2 4 5 7 8 10 14 20 28 29 35 40 49 56 58 70 98 116 140 145 196 203 232 245 280 290 359 392 406 490 580 718 812 980 1,015 1,160 1,421 1,436 1,624 1,795 1,960 2,030 2,513 2,842 2,872 3,590 4,060 5,026 5,684 7,105 7,180 8,120 10,052 10,411 11,368 12,565 14,210 14,360 17,591 20,104 20,822 25,130 28,420 35,182 41,644 50,260 52,055 56,840 70,364 72,877 83,288 87,955 100,520 104,110 140,728 145,754 175,910 208,220 291,508 351,820 364,385 416,440 510,139 583,016 703,640 728,770 1,020,278 1,457,540 2,040,556 2,550,695 2,915,080 4,081,112 5,101,390 10,202,780 and 20,405,560, with no remainder.

Since 20,405,560 cannot be divided by just 1 and 20,405,560, 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).