18113516 has 12 divisors (see below), whose sum is σ = 32791920. Its totient is φ = 8744400.

The previous prime is 18113509. The next prime is 18113519. The reversal of 18113516 is 61531181.

It is not an unprimeable number, because it can be changed into a prime (18113519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77960 + ... + 78191.

It is an arithmetic number, because the mean of its divisors is an integer number (2732660).

Almost surely, 2^18113516 is an apocalyptic number.

It is an amenable number.

18113516 is a deficient number, since it is larger than the sum of its proper divisors (14678404).

18113516 is a wasteful number, since it uses less digits than its factorization.

18113516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156184 (or 156182 counting only the distinct ones).

The product of its digits is 720, while the sum is 26.

The square root of 18113516 is about 4255.9976503753. The cubic root of 18113516 is about 262.6239040157.

Adding to 18113516 its reverse (61531181), we get a palindrome (79644697).

The spelling of 18113516 in words is "eighteen million, one hundred thirteen thousand, five hundred sixteen".