18505174055 has 32 divisors (see below), whose sum is σ = 24035844096. Its totient is φ = 13641433344.

The previous prime is 18505174001. The next prime is 18505174057. The reversal of 18505174055 is 55047150581.

It is a cyclic number.

It is not a de Polignac number, because 18505174055 - 2⁶ = 18505173991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18505174057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 335354 + ... + 386616.

It is an arithmetic number, because the mean of its divisors is an integer number (751120128).

Almost surely, 2^18505174055 is an apocalyptic number.

18505174055 is a deficient number, since it is larger than the sum of its proper divisors (5530670041).

18505174055 is a wasteful number, since it uses less digits than its factorization.

18505174055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51407.

The product of its (nonzero) digits is 140000, while the sum is 41.

The spelling of 18505174055 in words is "eighteen billion, five hundred five million, one hundred seventy-four thousand, fifty-five".