18116857 has 8 divisors (see below), whose sum is σ = 20043072. Its totient is φ = 16237200.

The previous prime is 18116827. The next prime is 18116863. The reversal of 18116857 is 75861181.

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

It is a cyclic number.

It is not a de Polignac number, because 18116857 - 2⁷ = 18116729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18116807) 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, 10818 + ... + 12379.

It is an arithmetic number, because the mean of its divisors is an integer number (2505384).

Almost surely, 2^18116857 is an apocalyptic number.

It is an amenable number.

18116857 is a deficient number, since it is larger than the sum of its proper divisors (1926215).

18116857 is a wasteful number, since it uses less digits than its factorization.

18116857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23279.

The product of its digits is 13440, while the sum is 37.

The square root of 18116857 is about 4256.3901371937. The cubic root of 18116857 is about 262.6400498323.

It can be divided in two parts, 1811 and 6857, that added together give a palindrome (8668).

The spelling of 18116857 in words is "eighteen million, one hundred sixteen thousand, eight hundred fifty-seven".