18718252713 has 16 divisors (see below), whose sum is σ = 29361965760. Its totient is φ = 11744785728.

The previous prime is 18718252699. The next prime is 18718252753. The reversal of 18718252713 is 31725281781.

It is not a de Polignac number, because 18718252713 - 2⁴ = 18718252697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18718252753) 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, 20389795 + ... + 20390712.

It is an arithmetic number, because the mean of its divisors is an integer number (1835122860).

Almost surely, 2^18718252713 is an apocalyptic number.

It is an amenable number.

18718252713 is a deficient number, since it is larger than the sum of its proper divisors (10643713047).

18718252713 is a wasteful number, since it uses less digits than its factorization.

18718252713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40780533 (or 40780527 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The spelling of 18718252713 in words is "eighteen billion, seven hundred eighteen million, two hundred fifty-two thousand, seven hundred thirteen".