18518385055 has 8 divisors (see below), whose sum is σ = 23391644400. Its totient is φ = 14034986496.

The previous prime is 18518385043. The next prime is 18518385077. The reversal of 18518385055 is 55058381581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18518385055 - 2¹⁵ = 18518352287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97465090 + ... + 97465279.

It is an arithmetic number, because the mean of its divisors is an integer number (2923955550).

Almost surely, 2^18518385055 is an apocalyptic number.

18518385055 is a deficient number, since it is larger than the sum of its proper divisors (4873259345).

18518385055 is a wasteful number, since it uses less digits than its factorization.

18518385055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194930393.

The product of its (nonzero) digits is 960000, while the sum is 49.

The spelling of 18518385055 in words is "eighteen billion, five hundred eighteen million, three hundred eighty-five thousand, fifty-five".