18038559518 has 16 divisors (see below), whose sum is σ = 30953263104. Its totient is φ = 7723306680.

The previous prime is 18038559463. The next prime is 18038559541. The reversal of 18038559518 is 81595583081.

It is a self number, because there is not a number n which added to its sum of digits gives 18038559518.

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, 610430 + ... + 639297.

It is an arithmetic number, because the mean of its divisors is an integer number (1934578944).

Almost surely, 2^18038559518 is an apocalyptic number.

18038559518 is a deficient number, since it is larger than the sum of its proper divisors (12914703586).

18038559518 is a wasteful number, since it uses less digits than its factorization.

18038559518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250767.

The product of its (nonzero) digits is 1728000, while the sum is 53.

The spelling of 18038559518 in words is "eighteen billion, thirty-eight million, five hundred fifty-nine thousand, five hundred eighteen".