18118365 has 16 divisors (see below), whose sum is σ = 30250368. Its totient is φ = 9242816.

The previous prime is 18118361. The next prime is 18118367. The reversal of 18118365 is 56381181.

It is a cyclic number.

It is not a de Polignac number, because 18118365 - 2² = 18118361 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18118361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25914 + ... + 26603.

It is an arithmetic number, because the mean of its divisors is an integer number (1890648).

Almost surely, 2^18118365 is an apocalyptic number.

18118365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18118365 is a deficient number, since it is larger than the sum of its proper divisors (12132003).

18118365 is a wasteful number, since it uses less digits than its factorization.

18118365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52548.

The product of its digits is 5760, while the sum is 33.

The square root of 18118365 is about 4256.5672789232. The cubic root of 18118365 is about 262.6473367880.

The spelling of 18118365 in words is "eighteen million, one hundred eighteen thousand, three hundred sixty-five".