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18673837134 = 23149163128147
BaseRepresentation
bin10001011001000011…
…000010010001001110
31210012102010012210120
4101121003002101032
5301221000242014
612324553045410
71230516665601
oct213103022116
953172105716
1018673837134
117a12992257
1237519b6866
1319b7a0c394
14c92114338
1574460dba9
hex4590c244e

18673837134 has 32 divisors (see below), whose sum is σ = 37829289600. Its totient is φ = 6144856992.

The previous prime is 18673837111. The next prime is 18673837139. The reversal of 18673837134 is 43173837681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18673837139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81649 + ... + 209795.

It is an arithmetic number, because the mean of its divisors is an integer number (1182165300).

Almost surely, 218673837134 is an apocalyptic number.

18673837134 is an abundant number, since it is smaller than the sum of its proper divisors (19155452466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18673837134 is a wasteful number, since it uses less digits than its factorization.

18673837134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128464.

The product of its digits is 2032128, while the sum is 51.

The spelling of 18673837134 in words is "eighteen billion, six hundred seventy-three million, eight hundred thirty-seven thousand, one hundred thirty-four".

Divisors: 1 2 3 6 149 163 298 326 447 489 894 978 24287 48574 72861 128147 145722 256294 384441 768882 19093903 20887961 38187806 41775922 57281709 62663883 114563418 125327766 3112306189 6224612378 9336918567 18673837134