18993064713 has 16 divisors (see below), whose sum is σ = 28943870976. Its totient is φ = 10852408080.

The previous prime is 18993064711. The next prime is 18993064759. The reversal of 18993064713 is 31746039981.

It is not a de Polignac number, because 18993064713 - 2¹ = 18993064711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18993064711) 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, 414420 + ... + 457962.

It is an arithmetic number, because the mean of its divisors is an integer number (1808991936).

Almost surely, 2^18993064713 is an apocalyptic number.

It is an amenable number.

18993064713 is a deficient number, since it is larger than the sum of its proper divisors (9950806263).

18993064713 is a wasteful number, since it uses less digits than its factorization.

18993064713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64324.

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 18993064713 in words is "eighteen billion, nine hundred ninety-three million, sixty-four thousand, seven hundred thirteen".