18255823864 has 64 divisors (see below), whose sum is σ = 37492761600. Its totient is φ = 8295974400.

The previous prime is 18255823841. The next prime is 18255823889. The reversal of 18255823864 is 46832855281.

It is a congruent number.

It is an unprimeable number.

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, 2065647 + ... + 2074465.

It is an arithmetic number, because the mean of its divisors is an integer number (585824400).

Almost surely, 2^18255823864 is an apocalyptic number.

It is an amenable number.

18255823864 is an abundant number, since it is smaller than the sum of its proper divisors (19236937736).

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

18255823864 is a wasteful number, since it uses less digits than its factorization.

18255823864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9364 (or 9360 counting only the distinct ones).

The product of its digits is 3686400, while the sum is 52.

The spelling of 18255823864 in words is "eighteen billion, two hundred fifty-five million, eight hundred twenty-three thousand, eight hundred sixty-four".