18872331408 has 120 divisors (see below), whose sum is σ = 60416186688. Its totient is φ = 5387210496.

The previous prime is 18872331383. The next prime is 18872331461. The reversal of 18872331408 is 80413327881.

18872331408 is a `hidden beast` number, since 1 + 8 + 8 + 7 + 233 + 1 + 408 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1188610 + ... + 1204382.

Almost surely, 2^18872331408 is an apocalyptic number.

18872331408 is a gapful number since it is divisible by the number (18) 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 18872331408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30208093344).

18872331408 is an abundant number, since it is smaller than the sum of its proper divisors (41543855280).

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

18872331408 is a wasteful number, since it uses less digits than its factorization.

18872331408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16981 (or 16972 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 18872331408 in words is "eighteen billion, eight hundred seventy-two million, three hundred thirty-one thousand, four hundred eight".