Base | Representation |
---|---|
bin | 100111001101… |
… | …0101111011101 |
3 | 1102200101120200 |
4 | 1032122233131 |
5 | 20230304030 |
6 | 2012334113 |
7 | 336505155 |
oct | 116325735 |
9 | 42611520 |
10 | 20556765 |
11 | 10670669 |
12 | 6a74339 |
13 | 4349988 |
14 | 2a31765 |
15 | 1c10d60 |
hex | 139abdd |
20556765 has 24 divisors (see below), whose sum is σ = 37508640. Its totient is φ = 10386144.
The previous prime is 20556743. The next prime is 20556769. The reversal of 20556765 is 56765502.
It is not a de Polignac number, because 20556765 - 213 = 20548573 is a prime.
It is a plaindrome in base 16.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (20556769) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11167 + ... + 12876.
It is an arithmetic number, because the mean of its divisors is an integer number (1562860).
Almost surely, 220556765 is an apocalyptic number.
It is an amenable number.
20556765 is a deficient number, since it is larger than the sum of its proper divisors (16951875).
20556765 is a wasteful number, since it uses less digits than its factorization.
20556765 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 24073 (or 24070 counting only the distinct ones).
The product of its (nonzero) digits is 63000, while the sum is 36.
The square root of 20556765 is about 4533.9568811359. The cubic root of 20556765 is about 273.9375645832.
It can be divided in two parts, 20556 and 765, that added together give a triangular number (21321 = T206).
The spelling of 20556765 in words is "twenty million, five hundred fifty-six thousand, seven hundred sixty-five".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.072 sec. • engine limits •