18978825124 has 24 divisors (see below), whose sum is σ = 38169714240. Its totient is φ = 8088339936.

The previous prime is 18978825121. The next prime is 18978825137. The reversal of 18978825124 is 42152887981.

It is not an unprimeable number, because it can be changed into a prime (18978825121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1888327 + ... + 1898350.

It is an arithmetic number, because the mean of its divisors is an integer number (1590404760).

Almost surely, 2^18978825124 is an apocalyptic number.

18978825124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18978825124 is an abundant number, since it is smaller than the sum of its proper divisors (19190889116).

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

18978825124 is a wasteful number, since it uses less digits than its factorization.

18978825124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3786867 (or 3786865 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 55.

The spelling of 18978825124 in words is "eighteen billion, nine hundred seventy-eight million, eight hundred twenty-five thousand, one hundred twenty-four".