Base | Representation |
---|---|
bin | 100111100001… |
… | …0000111111001 |
3 | 1102222120212001 |
4 | 1033002013321 |
5 | 20300434243 |
6 | 2020021001 |
7 | 341046355 |
oct | 117020771 |
9 | 42876761 |
10 | 20718073 |
11 | 10770882 |
12 | 6b31761 |
13 | 43a521c |
14 | 2a74465 |
15 | 1c43a4d |
hex | 13c21f9 |
20718073 has 2 divisors, whose sum is σ = 20718074. Its totient is φ = 20718072.
The previous prime is 20718031. The next prime is 20718077. The reversal of 20718073 is 37081702.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 16104169 + 4613904 = 4013^2 + 2148^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-20718073 is a prime.
It is not a weakly prime, because it can be changed into another prime (20718077) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10359036 + 10359037.
It is an arithmetic number, because the mean of its divisors is an integer number (10359037).
Almost surely, 220718073 is an apocalyptic number.
It is an amenable number.
20718073 is a deficient number, since it is larger than the sum of its proper divisors (1).
20718073 is an equidigital number, since it uses as much as digits as its factorization.
20718073 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 2352, while the sum is 28.
The square root of 20718073 is about 4551.7109969769. The cubic root of 20718073 is about 274.6522237342.
Adding to 20718073 its reverse (37081702), we get a palindrome (57799775).
The spelling of 20718073 in words is "twenty million, seven hundred eighteen thousand, seventy-three".
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