18915068508 has 24 divisors (see below), whose sum is σ = 50440182912. Its totient is φ = 5404305264.

The previous prime is 18915068483. The next prime is 18915068519. The reversal of 18915068508 is 80586051981.

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, 112589610 + ... + 112589777.

It is an arithmetic number, because the mean of its divisors is an integer number (2101674288).

Almost surely, 2^18915068508 is an apocalyptic number.

It is an amenable number.

18915068508 is an abundant number, since it is smaller than the sum of its proper divisors (31525114404).

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

18915068508 is a wasteful number, since it uses less digits than its factorization.

18915068508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225179401 (or 225179399 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 51.

The spelling of 18915068508 in words is "eighteen billion, nine hundred fifteen million, sixty-eight thousand, five hundred eight".