18978005124 has 72 divisors (see below), whose sum is σ = 52119681432. Its totient is φ = 5787694080.

The previous prime is 18978005119. The next prime is 18978005143. The reversal of 18978005124 is 42150087981.

It can be written as a sum of positive squares in 4 ways, for example, as 1371369024 + 17606636100 = 37032^2 + 132690^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18978005124.

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, 126547 + ... + 232314.

Almost surely, 2^18978005124 is an apocalyptic number.

It is an amenable number.

18978005124 is an abundant number, since it is smaller than the sum of its proper divisors (33141676308).

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

18978005124 is a wasteful number, since it uses less digits than its factorization.

18978005124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358997 (or 358992 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 18978005124 in words is "eighteen billion, nine hundred seventy-eight million, five thousand, one hundred twenty-four".