18318478418 has 16 divisors (see below), whose sum is σ = 29770662240. Its totient is φ = 8419983936.

The previous prime is 18318478393. The next prime is 18318478439. The reversal of 18318478418 is 81487481381.

It is a self number, because there is not a number n which added to its sum of digits gives 18318478418.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6263408 + ... + 6266331.

It is an arithmetic number, because the mean of its divisors is an integer number (1860666390).

Almost surely, 2^18318478418 is an apocalyptic number.

18318478418 is a deficient number, since it is larger than the sum of its proper divisors (11452183822).

18318478418 is a wasteful number, since it uses less digits than its factorization.

18318478418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12529801.

The product of its digits is 1376256, while the sum is 53.

The spelling of 18318478418 in words is "eighteen billion, three hundred eighteen million, four hundred seventy-eight thousand, four hundred eighteen".