Q: Is 21,178,368 a Composite Number?

Why is 21,178,368 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 21,178,368 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 64 72 96 108 128 144 192 216 256 288 383 384 432 512 576 766 768 864 1,024 1,149 1,152 1,532 1,536 1,728 2,048 2,298 2,304 3,064 3,072 3,447 3,456 4,596 4,608 6,128 6,144 6,894 6,912 9,192 9,216 10,341 12,256 13,788 13,824 18,384 18,432 20,682 24,512 27,576 27,648 36,768 41,364 49,024 55,152 55,296 73,536 82,728 98,048 110,304 147,072 165,456 196,096 220,608 294,144 330,912 392,192 441,216 588,288 661,824 784,384 882,432 1,176,576 1,323,648 1,764,864 2,353,152 2,647,296 3,529,728 5,294,592 7,059,456 10,589,184 and 21,178,368, with no remainder.

Since 21,178,368 cannot be divided by just 1 and 21,178,368, 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).