18818137355 has 32 divisors (see below), whose sum is σ = 24037032960. Its totient is φ = 14112362880.

The previous prime is 18818137259. The next prime is 18818137391. The reversal of 18818137355 is 55373181881.

It is not a de Polignac number, because 18818137355 - 2²⁸ = 18549701899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1980506 + ... + 1989984.

It is an arithmetic number, because the mean of its divisors is an integer number (751157280).

Almost surely, 2^18818137355 is an apocalyptic number.

18818137355 is a deficient number, since it is larger than the sum of its proper divisors (5218895605).

18818137355 is a wasteful number, since it uses less digits than its factorization.

18818137355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851.

The product of its digits is 806400, while the sum is 50.

The spelling of 18818137355 in words is "eighteen billion, eight hundred eighteen million, one hundred thirty-seven thousand, three hundred fifty-five".