18116 has 12 divisors (see below), whose sum is σ = 36288. Its totient is φ = 7752.

The previous prime is 18097. The next prime is 18119. The reversal of 18116 is 61181.

It is a happy number.

18116 is nontrivially palindromic in base 6.

18116 is an admirable number.

It is a plaindrome in base 11 and base 15.

It is a junction number, because it is equal to n+sod(n) for n = 18094 and 18103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18119) by changing a digit.

18116 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296 + ... + 351.

It is an arithmetic number, because the mean of its divisors is an integer number (3024).

2¹⁸¹¹⁶ is an apocalyptic number.

It is an amenable number.

18116 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.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18144).

18116 is a wasteful number, since it uses less digits than its factorization.

18116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658 (or 656 counting only the distinct ones).

The product of its digits is 48, while the sum is 17.

The square root of 18116 is about 134.5956908671. The cubic root of 18116 is about 26.2635908458.

Adding to 18116 its reverse (61181), we get a palindrome (79297).

The spelling of 18116 in words is "eighteen thousand, one hundred sixteen".