18506879936 has 14 divisors (see below), whose sum is σ = 36724590000. Its totient is φ = 9253439936.

The previous prime is 18506879933. The next prime is 18506879971. The reversal of 18506879936 is 63997860581.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18506879933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144584936 + ... + 144585063.

It is an arithmetic number, because the mean of its divisors is an integer number (2623185000).

Almost surely, 2^18506879936 is an apocalyptic number.

18506879936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18506879936 is a deficient number, since it is larger than the sum of its proper divisors (18217710064).

18506879936 is an equidigital number, since it uses as much as digits as its factorization.

18506879936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289170011 (or 289170001 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 18506879936 in words is "eighteen billion, five hundred six million, eight hundred seventy-nine thousand, nine hundred thirty-six".