18116504 has 16 divisors (see below), whose sum is σ = 38821200. Its totient is φ = 7764192.

The previous prime is 18116489. The next prime is 18116507. The reversal of 18116504 is 40561181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18116507) 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, 161699 + ... + 161810.

It is an arithmetic number, because the mean of its divisors is an integer number (2426325).

Almost surely, 2^18116504 is an apocalyptic number.

18116504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18116504 is an abundant number, since it is smaller than the sum of its proper divisors (20704696).

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

18116504 is a wasteful number, since it uses less digits than its factorization.

18116504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323522 (or 323518 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 18116504 is about 4256.3486699283. The cubic root of 18116504 is about 262.6383440077.

Adding to 18116504 its reverse (40561181), we get a palindrome (58677685).

The spelling of 18116504 in words is "eighteen million, one hundred sixteen thousand, five hundred four".