18978840204 has 12 divisors (see below), whose sum is σ = 44283960504. Its totient is φ = 6326280064.

The previous prime is 18978840197. The next prime is 18978840299. The reversal of 18978840204 is 40204887981.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 790784997 + ... + 790785020.

It is an arithmetic number, because the mean of its divisors is an integer number (3690330042).

Almost surely, 2^18978840204 is an apocalyptic number.

It is an amenable number.

18978840204 is an abundant number, since it is smaller than the sum of its proper divisors (25305120300).

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

18978840204 is a wasteful number, since it uses less digits than its factorization.

18978840204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581570024 (or 1581570022 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 51.

The spelling of 18978840204 in words is "eighteen billion, nine hundred seventy-eight million, eight hundred forty thousand, two hundred four".