Base | Representation |
---|---|
bin | 10010101110111100… |
… | …101000110110101111 |
3 | 1220220211220220121211 |
4 | 102232330220312233 |
5 | 312143420011001 |
6 | 13123554135251 |
7 | 1311316454026 |
oct | 225674506657 |
9 | 56824826554 |
10 | 20115000751 |
11 | 859243686a |
12 | 3a94581527 |
13 | 1b87471211 |
14 | d8b69d8bd |
15 | 7cadd5351 |
hex | 4aef28daf |
20115000751 has 8 divisors (see below), whose sum is σ = 20271500064. Its totient is φ = 19958641920.
The previous prime is 20115000743. The next prime is 20115000799. The reversal of 20115000751 is 15700051102.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 20115000751 - 23 = 20115000743 is a prime.
It is a super-2 number, since 2×201150007512 (a number of 21 digits) contains 22 as substring.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20115000701) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262086 + ... + 330028.
It is an arithmetic number, because the mean of its divisors is an integer number (2533937508).
Almost surely, 220115000751 is an apocalyptic number.
20115000751 is the 89700-th centered pentagonal number.
20115000751 is a deficient number, since it is larger than the sum of its proper divisors (156499313).
20115000751 is a wasteful number, since it uses less digits than its factorization.
20115000751 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 70241.
The product of its (nonzero) digits is 350, while the sum is 22.
Adding to 20115000751 its reverse (15700051102), we get a palindrome (35815051853).
The spelling of 20115000751 in words is "twenty billion, one hundred fifteen million, seven hundred fifty-one", and thus it is an aban number.
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