18864609518 has 16 divisors (see below), whose sum is σ = 28397952000. Its totient is φ = 9398657400.

The previous prime is 18864609509. The next prime is 18864609541. The reversal of 18864609518 is 81590646881.

It is a congruent number.

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, 1390733 + ... + 1404231.

It is an arithmetic number, because the mean of its divisors is an integer number (1774872000).

Almost surely, 2^18864609518 is an apocalyptic number.

18864609518 is a deficient number, since it is larger than the sum of its proper divisors (9533342482).

18864609518 is a wasteful number, since it uses less digits than its factorization.

18864609518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15943.

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 18864609518 in words is "eighteen billion, eight hundred sixty-four million, six hundred nine thousand, five hundred eighteen".