18578077924 has 12 divisors (see below), whose sum is σ = 37156155904. Its totient is φ = 7962033384.

The previous prime is 18578077913. The next prime is 18578077927. The reversal of 18578077924 is 42977087581.

18578077924 is an admirable number.

It is a super-2 number, since 2×18578077924² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18578077927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331751364 + ... + 331751419.

Almost surely, 2^18578077924 is an apocalyptic number.

18578077924 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18578077924 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18578077924 is a wasteful number, since it uses less digits than its factorization.

18578077924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663502794 (or 663502792 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 58.

The spelling of 18578077924 in words is "eighteen billion, five hundred seventy-eight million, seventy-seven thousand, nine hundred twenty-four".