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18013164169 = 7111356331963
BaseRepresentation
bin10000110001101010…
…110001001010001001
31201111100221112212111
4100301222301022021
5243342332223134
612135232342321
71205245240420
oct206152611211
951440845774
1018013164169
117703a63940
1235a86a49a1
131910b8c430
14c2c4962b7
15706608c64
hex431ab1289

18013164169 has 32 divisors (see below), whose sum is σ = 24229223424. Its totient is φ = 12933103680.

The previous prime is 18013164161. The next prime is 18013164193. The reversal of 18013164169 is 96146131081.

It is not a de Polignac number, because 18013164169 - 23 = 18013164161 is a prime.

It is a super-2 number, since 2×180131641692 (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18013164161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547582 + ... + 579544.

It is an arithmetic number, because the mean of its divisors is an integer number (757163232).

Almost surely, 218013164169 is an apocalyptic number.

It is an amenable number.

18013164169 is a deficient number, since it is larger than the sum of its proper divisors (6216059255).

18013164169 is a wasteful number, since it uses less digits than its factorization.

18013164169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32557.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 18013164169 in words is "eighteen billion, thirteen million, one hundred sixty-four thousand, one hundred sixty-nine".

Divisors: 1 7 11 13 77 91 143 563 1001 3941 6193 7319 31963 43351 51233 80509 223741 351593 415519 563563 2461151 2908633 4570709 17995169 31994963 125966183 197946859 233937197 1385628013 1637560379 2573309167 18013164169