18558042512 has 20 divisors (see below), whose sum is σ = 36792399600. Its totient is φ = 9063229728.

The previous prime is 18558042479. The next prime is 18558042521. The reversal of 18558042512 is 21524085581.

It is a self number, because there is not a number n which added to its sum of digits gives 18558042512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13486262 + ... + 13487637.

It is an arithmetic number, because the mean of its divisors is an integer number (1839619980).

Almost surely, 2^18558042512 is an apocalyptic number.

It is an amenable number.

18558042512 is a deficient number, since it is larger than the sum of its proper divisors (18234357088).

18558042512 is a wasteful number, since it uses less digits than its factorization.

18558042512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26973950 (or 26973944 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 41.

The spelling of 18558042512 in words is "eighteen billion, five hundred fifty-eight million, forty-two thousand, five hundred twelve".