18945878924 has 48 divisors (see below), whose sum is σ = 38519308800. Its totient is φ = 7985817216.

The previous prime is 18945878891. The next prime is 18945878933. The reversal of 18945878924 is 42987854981.

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, 720887 + ... + 746705.

It is an arithmetic number, because the mean of its divisors is an integer number (802485600).

Almost surely, 2^18945878924 is an apocalyptic number.

18945878924 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18945878924 is an abundant number, since it is smaller than the sum of its proper divisors (19573429876).

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

18945878924 is a wasteful number, since it uses less digits than its factorization.

18945878924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26262 (or 26260 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 65.

The spelling of 18945878924 in words is "eighteen billion, nine hundred forty-five million, eight hundred seventy-eight thousand, nine hundred twenty-four".