18932898432 has 128 divisors (see below), whose sum is σ = 58012899840. Its totient is φ = 5358763008.

The previous prime is 18932898421. The next prime is 18932898499. The reversal of 18932898432 is 23489823981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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, 254703 + ... + 320529.

It is an arithmetic number, because the mean of its divisors is an integer number (453225780).

Almost surely, 2^18932898432 is an apocalyptic number.

18932898432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18932898432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29006449920).

18932898432 is an abundant number, since it is smaller than the sum of its proper divisors (39080001408).

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

18932898432 is a wasteful number, since it uses less digits than its factorization.

18932898432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65958 (or 65946 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 57.

The spelling of 18932898432 in words is "eighteen billion, nine hundred thirty-two million, eight hundred ninety-eight thousand, four hundred thirty-two".