Check the properties of a positive integer to enter the number in the search box. If you input two numbers separated by a space, the properties of the pair like GCD are shown. If you separate two numbers by a comma, the sequences containing those numbers are listed.
20 = 2 × 2 × 5
4.47213595499957961010295548476279...
2.71441761659490632396796172542963...
0.0500000000000000
10100
5
24
14
| Prime number | No |
| Hexagonal number | No |
| Perfect number | No |
| Deficient number | No |
| Abundant number | No |
| Mersenne number | No |
| Harshad number | Yes |
| Harmonic divisor number | No |
QR20 (sequence)
0
Properties of the number 20: 20 has 6 divisors. The divisors of 20 are 1, 2, 4, 5, 10, 20 and the sum of them is 42. The factorization of 20 is 2 × 2 × 5. The square and cube of 20 are 400 and 8000 respectively. The square root and cube root of 20 are 4.47213595499957961010295548476279... and 2.71441761659490632396796172542963.... The binary, octal, hexadecimal of 20 are 10100, 24, 14. 20 is not a prime number, not hexagonal number, not perfect number, not deficient number, not Mersenne number, not Mersenne number, Harshad number, not harmonic divisor number.
0.91294525072762766626510710921139...
0.40808206181339196083612819165864...
2.23716094422474265357436706835870...
0.34202014332566871290808308003761...
0.93969262078590842790504211734515...
0.36397023426620234154427180328639...
2.99573227355399085425347038835753...
1.30102999566398125352861825376749...
4.32192809488736262579777758219279...