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18803234917 = 1983113105517
BaseRepresentation
bin10001100000110000…
…101001100001100101
31210112102121022012001
4101200300221201211
5302002112004132
612345454325301
71233650600605
oct214060514145
953472538161
1018803234917
117a79a32775
1237891b9831
131a08776a0c
14ca5398c05
15750b6dce7
hex460c29865

18803234917 has 16 divisors (see below), whose sum is σ = 20208807360. Its totient is φ = 17443060992.

The previous prime is 18803234911. The next prime is 18803234927. The reversal of 18803234917 is 71943230881.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-18803234917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18803234911) 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, 125443 + ... + 230959.

It is an arithmetic number, because the mean of its divisors is an integer number (1263050460).

Almost surely, 218803234917 is an apocalyptic number.

It is an amenable number.

18803234917 is a deficient number, since it is larger than the sum of its proper divisors (1405572443).

18803234917 is a wasteful number, since it uses less digits than its factorization.

18803234917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105732.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 18803234917 in words is "eighteen billion, eight hundred three million, two hundred thirty-four thousand, nine hundred seventeen".

Divisors: 1 19 83 113 1577 2147 9379 105517 178201 2004823 8757911 11923421 166400309 226544999 989643943 18803234917