18314861918 has 16 divisors (see below), whose sum is σ = 28063010400. Its totient is φ = 8962034400.

The previous prime is 18314861899. The next prime is 18314861933. The reversal of 18314861918 is 81916841381.

It is a happy number.

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, 352913 + ... + 401468.

It is an arithmetic number, because the mean of its divisors is an integer number (1753938150).

Almost surely, 2^18314861918 is an apocalyptic number.

18314861918 is a deficient number, since it is larger than the sum of its proper divisors (9748148482).

18314861918 is a wasteful number, since it uses less digits than its factorization.

18314861918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754643.

The product of its digits is 331776, while the sum is 50.

The spelling of 18314861918 in words is "eighteen billion, three hundred fourteen million, eight hundred sixty-one thousand, nine hundred eighteen".