18113519418 has 32 divisors (see below), whose sum is σ = 37625137152. Its totient is φ = 5807214000.

The previous prime is 18113519381. The next prime is 18113519453. The reversal of 18113519418 is 81491531181.

It is a self number, because there is not a number n which added to its sum of digits gives 18113519418.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268408 + ... + 329043.

It is an arithmetic number, because the mean of its divisors is an integer number (1175785536).

Almost surely, 2^18113519418 is an apocalyptic number.

18113519418 is an abundant number, since it is smaller than the sum of its proper divisors (19511617734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18113519418 is a wasteful number, since it uses less digits than its factorization.

18113519418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597650.

The product of its digits is 34560, while the sum is 42.

The spelling of 18113519418 in words is "eighteen billion, one hundred thirteen million, five hundred nineteen thousand, four hundred eighteen".