18934480308156 has 48 divisors (see below), whose sum is σ = 50525364072960. Its totient is φ = 5406271168320.

The previous prime is 18934480308119. The next prime is 18934480308181. The reversal of 18934480308156 is 65180308443981.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18934480308156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74462911 + ... + 74716758.

It is an arithmetic number, because the mean of its divisors is an integer number (1052611751520).

Almost surely, 2^{18934480308156} is an apocalyptic number.

It is an amenable number.

18934480308156 is an abundant number, since it is smaller than the sum of its proper divisors (31590883764804).

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

18934480308156 is a wasteful number, since it uses less digits than its factorization.

18934480308156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149181194 (or 149181192 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 60.

The spelling of 18934480308156 in words is "eighteen trillion, nine hundred thirty-four billion, four hundred eighty million, three hundred eight thousand, one hundred fifty-six".