18418857879 has 8 divisors (see below), whose sum is σ = 24751851520. Its totient is φ = 12182551416.

The previous prime is 18418857869. The next prime is 18418857881. The reversal of 18418857879 is 97875881481.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18418857879 - 2²³ = 18410469271 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 (18418857869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24171349 + ... + 24172110.

It is an arithmetic number, because the mean of its divisors is an integer number (3093981440).

Almost surely, 2^18418857879 is an apocalyptic number.

18418857879 is a deficient number, since it is larger than the sum of its proper divisors (6332993641).

18418857879 is a wasteful number, since it uses less digits than its factorization.

18418857879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48343589.

The product of its digits is 36126720, while the sum is 66.

The spelling of 18418857879 in words is "eighteen billion, four hundred eighteen million, eight hundred fifty-seven thousand, eight hundred seventy-nine".