18783690868 has 12 divisors (see below), whose sum is σ = 32915705760. Its totient is φ = 9379203512.

The previous prime is 18783690857. The next prime is 18783690883. The reversal of 18783690868 is 86809638781.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3157138 + ... + 3163081.

It is an arithmetic number, because the mean of its divisors is an integer number (2742975480).

Almost surely, 2^18783690868 is an apocalyptic number.

It is an amenable number.

18783690868 is a deficient number, since it is larger than the sum of its proper divisors (14132014892).

18783690868 is a wasteful number, since it uses less digits than its factorization.

18783690868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6320966 (or 6320964 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 18783690868 in words is "eighteen billion, seven hundred eighty-three million, six hundred ninety thousand, eight hundred sixty-eight".