18503702035018 has 16 divisors (see below), whose sum is σ = 28065198316680. Its totient is φ = 9148795831296.

The previous prime is 18503702035009. The next prime is 18503702035033. The reversal of 18503702035018 is 81053020730581.

It can be written as a sum of positive squares in 4 ways, for example, as 10581768279369 + 7921933755649 = 3252963^2 + 2814593^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39743373 + ... + 40206256.

Almost surely, 2^{18503702035018} is an apocalyptic number.

18503702035018 is a deficient number, since it is larger than the sum of its proper divisors (9561496281662).

18503702035018 is a wasteful number, since it uses less digits than its factorization.

18503702035018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79950921.

The product of its (nonzero) digits is 201600, while the sum is 43.

Adding to 18503702035018 its reverse (81053020730581), we get a palindrome (99556722765599).

The spelling of 18503702035018 in words is "eighteen trillion, five hundred three billion, seven hundred two million, thirty-five thousand, eighteen".