18700040918 has 16 divisors (see below), whose sum is σ = 30633222816. Its totient is φ = 8509226880.

The previous prime is 18700040897. The next prime is 18700040951. The reversal of 18700040918 is 81904000781.

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, 5063171 + ... + 5066862.

It is an arithmetic number, because the mean of its divisors is an integer number (1914576426).

Almost surely, 2^18700040918 is an apocalyptic number.

18700040918 is a deficient number, since it is larger than the sum of its proper divisors (11933181898).

18700040918 is a wasteful number, since it uses less digits than its factorization.

18700040918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10130119.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 18700040918 in words is "eighteen billion, seven hundred million, forty thousand, nine hundred eighteen".