18913878016 has 112 divisors (see below), whose sum is σ = 43439852160. Its totient is φ = 8143994880.

The previous prime is 18913877951. The next prime is 18913878031. The reversal of 18913878016 is 61087831981.

It is a congruent number.

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, 1706605 + ... + 1717651.

Almost surely, 2^18913878016 is an apocalyptic number.

18913878016 is a gapful number since it is divisible by the number (16) 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 18913878016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21719926080).

18913878016 is an abundant number, since it is smaller than the sum of its proper divisors (24525974144).

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

18913878016 is a wasteful number, since it uses less digits than its factorization.

18913878016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11103 (or 11079 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 52.

The spelling of 18913878016 in words is "eighteen billion, nine hundred thirteen million, eight hundred seventy-eight thousand, sixteen".