18116208 has 60 divisors (see below), whose sum is σ = 55314168. Its totient is φ = 5489280.

The previous prime is 18116173. The next prime is 18116209. The reversal of 18116208 is 80261181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18116209) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4135 + ... + 7302.

Almost surely, 2^18116208 is an apocalyptic number.

18116208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18116208 is an abundant number, since it is smaller than the sum of its proper divisors (37197960).

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

18116208 is a wasteful number, since it uses less digits than its factorization.

18116208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11462 (or 11453 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 18116208 is about 4256.3138981988. The cubic root of 18116208 is about 262.6369136108.

Adding to 18116208 its reverse (80261181), we get a palindrome (98377389).

The spelling of 18116208 in words is "eighteen million, one hundred sixteen thousand, two hundred eight".