18116418 has 16 divisors (see below), whose sum is σ = 36283680. Its totient is φ = 6030336.

The previous prime is 18116401. The next prime is 18116447. The reversal of 18116418 is 81461181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3778 + ... + 7106.

It is an arithmetic number, because the mean of its divisors is an integer number (2267730).

Almost surely, 2^18116418 is an apocalyptic number.

18116418 is an abundant number, since it is smaller than the sum of its proper divisors (18167262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18116418 is a wasteful number, since it uses less digits than its factorization.

18116418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4241.

The product of its digits is 1536, while the sum is 30.

The square root of 18116418 is about 4256.3385673604. The cubic root of 18116418 is about 262.6379284210.

Adding to 18116418 its reverse (81461181), we get a palindrome (99577599).

The spelling of 18116418 in words is "eighteen million, one hundred sixteen thousand, four hundred eighteen".