18116608 has 26 divisors (see below), whose sum is σ = 36236984. Its totient is φ = 9056256.

The previous prime is 18116597. The next prime is 18116653. The reversal of 18116608 is 80661181.

It is a happy number.

It is a super-2 number, since 2×18116608² = 656422970851328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18116608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1885 + ... + 6307.

Almost surely, 2^18116608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18116608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18118492).

18116608 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18116608 is an frugal number, since it uses more digits than its factorization.

18116608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4447 (or 4425 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18116608 is about 4256.3608869550. The cubic root of 18116608 is about 262.6388465759.

Adding to 18116608 its reverse (80661181), we get a palindrome (98777789).

The spelling of 18116608 in words is "eighteen million, one hundred sixteen thousand, six hundred eight".