18891083032 has 64 divisors (see below), whose sum is σ = 38452320000. Its totient is φ = 8672549760.

The previous prime is 18891083027. The next prime is 18891083041. The reversal of 18891083032 is 23038019881.

It is a self number, because there is not a number n which added to its sum of digits gives 18891083032.

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, 621894 + ... + 651562.

It is an arithmetic number, because the mean of its divisors is an integer number (600817500).

Almost surely, 2^18891083032 is an apocalyptic number.

It is an amenable number.

18891083032 is an abundant number, since it is smaller than the sum of its proper divisors (19561236968).

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

18891083032 is a wasteful number, since it uses less digits than its factorization.

18891083032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29824 (or 29820 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 18891083032 in words is "eighteen billion, eight hundred ninety-one million, eighty-three thousand, thirty-two".