18805116 has 48 divisors (see below), whose sum is σ = 48343680. Its totient is φ = 5641920.

The previous prime is 18805109. The next prime is 18805133. The reversal of 18805116 is 61150881.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13735 + ... + 15041.

It is an arithmetic number, because the mean of its divisors is an integer number (1007160).

Almost surely, 2^18805116 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 18805116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24171840).

18805116 is an abundant number, since it is smaller than the sum of its proper divisors (29538564).

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

18805116 is a wasteful number, since it uses less digits than its factorization.

18805116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434 (or 1432 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 18805116 is about 4336.4865963127. The cubic root of 18805116 is about 265.9246964935.

Adding to 18805116 its reverse (61150881), we get a palindrome (79955997).

It can be divided in two parts, 1880 and 5116, that added together give a palindrome (6996).

The spelling of 18805116 in words is "eighteen million, eight hundred five thousand, one hundred sixteen".