18680116 has 96 divisors (see below), whose sum is σ = 44092160. Its totient is φ = 6718464.

The previous prime is 18680113. The next prime is 18680141. The reversal of 18680116 is 61108681.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680111) by changing a digit.

It is a nontrivial repunit in base 265.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255856 + ... + 255928.

Almost surely, 2^18680116 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 18680116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22046080).

18680116 is an abundant number, since it is smaller than the sum of its proper divisors (25412044).

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

18680116 is a wasteful number, since it uses less digits than its factorization.

18680116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 151 counting only the distinct ones).

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

The square root of 18680116 is about 4322.0499765736. The cubic root of 18680116 is about 265.3341743588.

Adding to 18680116 its reverse (61108681), we get a palindrome (79788797).

The spelling of 18680116 in words is "eighteen million, six hundred eighty thousand, one hundred sixteen".