18766109904 has 40 divisors (see below), whose sum is σ = 50042963712. Its totient is φ = 6053583360.

The previous prime is 18766109903. The next prime is 18766109911. The reversal of 18766109904 is 40990166781.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18766109903) 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, 6304329 + ... + 6307304.

Almost surely, 2^18766109904 is an apocalyptic number.

It is an amenable number.

18766109904 is an abundant number, since it is smaller than the sum of its proper divisors (31276853808).

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

18766109904 is a wasteful number, since it uses less digits than its factorization.

18766109904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12611675 (or 12611669 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 51.

The spelling of 18766109904 in words is "eighteen billion, seven hundred sixty-six million, one hundred nine thousand, nine hundred four".