18103808772 has 120 divisors (see below), whose sum is σ = 55953226560. Its totient is φ = 4994136000.

The previous prime is 18103808747. The next prime is 18103808809. The reversal of 18103808772 is 27780830181.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 39 ways as a sum of consecutive naturals, for example, 71854 + ... + 203397.

It is an arithmetic number, because the mean of its divisors is an integer number (466276888).

Almost surely, 2^18103808772 is an apocalyptic number.

18103808772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18103808772 is an abundant number, since it is smaller than the sum of its proper divisors (37849417788).

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

18103808772 is a wasteful number, since it uses less digits than its factorization.

18103808772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275303 (or 275292 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The spelling of 18103808772 in words is "eighteen billion, one hundred three million, eight hundred eight thousand, seven hundred seventy-two".