18995595520 has 72 divisors (see below), whose sum is σ = 49636823040. Its totient is φ = 6907484160.

The previous prime is 18995595499. The next prime is 18995595547. The reversal of 18995595520 is 2559559981.

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 7 ways as a sum of consecutive naturals, for example, 660480 + ... + 688639.

It is an arithmetic number, because the mean of its divisors is an integer number (689400320).

Almost surely, 2^18995595520 is an apocalyptic number.

18995595520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18995595520 is an abundant number, since it is smaller than the sum of its proper divisors (30641227520).

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

18995595520 is a wasteful number, since it uses less digits than its factorization.

18995595520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349151 (or 1349137 counting only the distinct ones).

The product of its (nonzero) digits is 7290000, while the sum is 58.

The spelling of 18995595520 in words is "eighteen billion, nine hundred ninety-five million, five hundred ninety-five thousand, five hundred twenty".