Base | Representation |
---|---|
bin | 10100001111111101… |
… | …011000100010111111 |
3 | 2002010021111210220201 |
4 | 110033331120202333 |
5 | 324012100223142 |
6 | 13553255024331 |
7 | 1366541634460 |
oct | 241775304277 |
9 | 62107453821 |
10 | 21742586047 |
11 | 9248139786 |
12 | 426966b0a7 |
13 | 2086714b40 |
14 | 10a38d4d67 |
15 | 873c32ab7 |
hex | 50ff588bf |
21742586047 has 16 divisors (see below), whose sum is σ = 26765444160. Its totient is φ = 17199493632.
The previous prime is 21742586023. The next prime is 21742586051. The reversal of 21742586047 is 74068524712.
It is a cyclic number.
It is not a de Polignac number, because 21742586047 - 215 = 21742553279 is a prime.
It is a super-2 number, since 2×217425860472 (a number of 21 digits) contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 21742585988 and 21742586006.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (21742586147) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497079 + ... + 539047.
It is an arithmetic number, because the mean of its divisors is an integer number (1672840260).
Almost surely, 221742586047 is an apocalyptic number.
21742586047 is a deficient number, since it is larger than the sum of its proper divisors (5022858113).
21742586047 is a wasteful number, since it uses less digits than its factorization.
21742586047 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 47682.
The product of its (nonzero) digits is 752640, while the sum is 46.
The spelling of 21742586047 in words is "twenty-one billion, seven hundred forty-two million, five hundred eighty-six thousand, forty-seven".
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