18115318 has 8 divisors (see below), whose sum is σ = 29263248. Its totient is φ = 8360904.

The previous prime is 18115313. The next prime is 18115367. The reversal of 18115318 is 81351181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18115318² = 656329492482248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18115313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348346 + ... + 348397.

It is an arithmetic number, because the mean of its divisors is an integer number (3657906).

Almost surely, 2^18115318 is an apocalyptic number.

18115318 is a deficient number, since it is larger than the sum of its proper divisors (11147930).

18115318 is a wasteful number, since it uses less digits than its factorization.

18115318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696758.

The product of its digits is 960, while the sum is 28.

The square root of 18115318 is about 4256.2093463550. The cubic root of 18115318 is about 262.6326126614.

Adding to 18115318 its reverse (81351181), we get a palindrome (99466499).

The spelling of 18115318 in words is "eighteen million, one hundred fifteen thousand, three hundred eighteen".