18686763479213 has 16 divisors (see below), whose sum is σ = 19855095216000. Its totient is φ = 17536984823232.

The previous prime is 18686763479183. The next prime is 18686763479339. The reversal of 18686763479213 is 31297436768681.

It is a cyclic number.

It is not a de Polignac number, because 18686763479213 - 2³⁰ = 18685689737389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18686763479513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8470403 + ... + 10446111.

It is an arithmetic number, because the mean of its divisors is an integer number (1240943451000).

Almost surely, 2^{18686763479213} is an apocalyptic number.

It is an amenable number.

18686763479213 is a deficient number, since it is larger than the sum of its proper divisors (1168331736787).

18686763479213 is a wasteful number, since it uses less digits than its factorization.

18686763479213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980404.

The product of its digits is 438939648, while the sum is 71.

The spelling of 18686763479213 in words is "eighteen trillion, six hundred eighty-six billion, seven hundred sixty-three million, four hundred seventy-nine thousand, two hundred thirteen".