18870120888 has 64 divisors (see below), whose sum is σ = 47631717120. Its totient is φ = 6229440000.

The previous prime is 18870120881. The next prime is 18870120889. The reversal of 18870120888 is 88802107881.

It is a self number, because there is not a number n which added to its sum of digits gives 18870120888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18870120881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1213563 + ... + 1229013.

It is an arithmetic number, because the mean of its divisors is an integer number (744245580).

Almost surely, 2^18870120888 is an apocalyptic number.

It is an amenable number.

18870120888 is an abundant number, since it is smaller than the sum of its proper divisors (28761596232).

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

18870120888 is a wasteful number, since it uses less digits than its factorization.

18870120888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15948 (or 15944 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 51.

The spelling of 18870120888 in words is "eighteen billion, eight hundred seventy million, one hundred twenty thousand, eight hundred eighty-eight".