18520116 has 24 divisors (see below), whose sum is σ = 43283520. Its totient is φ = 6163392.

The previous prime is 18520111. The next prime is 18520147. The reversal of 18520116 is 61102581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18520111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12865 + ... + 14231.

It is an arithmetic number, because the mean of its divisors is an integer number (1803480).

Almost surely, 2^18520116 is an apocalyptic number.

It is an amenable number.

18520116 is an abundant number, since it is smaller than the sum of its proper divisors (24763404).

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

18520116 is a wasteful number, since it uses less digits than its factorization.

18520116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2503 (or 2501 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 18520116 is about 4303.5004356919. The cubic root of 18520116 is about 264.5744493073.

Adding to 18520116 its reverse (61102581), we get a palindrome (79622697).

It can be divided in two parts, 185 and 20116, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 18520116 in words is "eighteen million, five hundred twenty thousand, one hundred sixteen".