18527668347 has 4 divisors (see below), whose sum is σ = 24703557800. Its totient is φ = 12351778896.

The previous prime is 18527668319. The next prime is 18527668349. The reversal of 18527668347 is 74386672581.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 18527668347 - 2²³ = 18519279739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18527668349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3087944722 + ... + 3087944727.

It is an arithmetic number, because the mean of its divisors is an integer number (6175889450).

Almost surely, 2^18527668347 is an apocalyptic number.

18527668347 is a deficient number, since it is larger than the sum of its proper divisors (6175889453).

18527668347 is an equidigital number, since it uses as much as digits as its factorization.

18527668347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6175889452.

The product of its digits is 13547520, while the sum is 57.

The spelling of 18527668347 in words is "eighteen billion, five hundred twenty-seven million, six hundred sixty-eight thousand, three hundred forty-seven".