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18128080054 = 274131582021
BaseRepresentation
bin10000111000100001…
…001000110010110110
31201210101011212211101
4100320201020302312
5244111242030204
612154455400314
71211142065230
oct207041106266
951711155741
1018128080054
117762912947
12361b08309a
13192b9261b6
14c3d84b250
15711757ea4
hex438848cb6

18128080054 has 16 divisors (see below), whose sum is σ = 31834678176. Its totient is φ = 7579684800.

The previous prime is 18128080037. The next prime is 18128080093. The reversal of 18128080054 is 45008082181.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18128079995 and 18128080022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15790437 + ... + 15791584.

It is an arithmetic number, because the mean of its divisors is an integer number (1989667386).

Almost surely, 218128080054 is an apocalyptic number.

18128080054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18128080054 is a deficient number, since it is larger than the sum of its proper divisors (13706598122).

18128080054 is a wasteful number, since it uses less digits than its factorization.

18128080054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31582071.

The product of its (nonzero) digits is 20480, while the sum is 37.

The spelling of 18128080054 in words is "eighteen billion, one hundred twenty-eight million, eighty thousand, fifty-four".

Divisors: 1 2 7 14 41 82 287 574 31582021 63164042 221074147 442148294 1294862861 2589725722 9064040027 18128080054