18518668336703 has 8 divisors (see below), whose sum is σ = 18533721225600. Its totient is φ = 18503616739608.

The previous prime is 18518668336681. The next prime is 18518668336733. The reversal of 18518668336703 is 30763386681581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18518668336703 - 2⁴² = 14120621825599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18518668336703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18518668336733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29474408 + ... + 30096146.

It is an arithmetic number, because the mean of its divisors is an integer number (2316715153200).

Almost surely, 2^{18518668336703} is an apocalyptic number.

18518668336703 is a deficient number, since it is larger than the sum of its proper divisors (15052888897).

18518668336703 is a wasteful number, since it uses less digits than its factorization.

18518668336703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645901.

The product of its (nonzero) digits is 104509440, while the sum is 65.

The spelling of 18518668336703 in words is "eighteen trillion, five hundred eighteen billion, six hundred sixty-eight million, three hundred thirty-six thousand, seven hundred three".