18885863918 has 16 divisors (see below), whose sum is σ = 28405980720. Its totient is φ = 9417240000.

The previous prime is 18885863897. The next prime is 18885863957. The reversal of 18885863918 is 81936858881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125893 + ... + 1142543.

It is an arithmetic number, because the mean of its divisors is an integer number (1775373795).

Almost surely, 2^18885863918 is an apocalyptic number.

18885863918 is a deficient number, since it is larger than the sum of its proper divisors (9520116802).

18885863918 is a wasteful number, since it uses less digits than its factorization.

18885863918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18163.

The product of its digits is 26542080, while the sum is 65.

The spelling of 18885863918 in words is "eighteen billion, eight hundred eighty-five million, eight hundred sixty-three thousand, nine hundred eighteen".