18312618167 has 4 divisors (see below), whose sum is σ = 18433893936. Its totient is φ = 18191342400.

The previous prime is 18312618157. The next prime is 18312618169. The reversal of 18312618167 is 76181621381.

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

It is a cyclic number.

It is not a de Polignac number, because 18312618167 - 2²² = 18308423863 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 (18312618169) 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, 60637658 + ... + 60637959.

It is an arithmetic number, because the mean of its divisors is an integer number (4608473484).

Almost surely, 2^18312618167 is an apocalyptic number.

18312618167 is a deficient number, since it is larger than the sum of its proper divisors (121275769).

18312618167 is a wasteful number, since it uses less digits than its factorization.

18312618167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121275768.

The product of its digits is 96768, while the sum is 44.

The spelling of 18312618167 in words is "eighteen billion, three hundred twelve million, six hundred eighteen thousand, one hundred sixty-seven".