13218368 has 28 divisors (see below), whose sum is σ = 26369772. Its totient is φ = 6574080.

The previous prime is 13218349. The next prime is 13218371. The reversal of 13218368 is 86381231.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11235904 + 1982464 = 3352^2 + 1408^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14996 + ... + 15852.

Almost surely, 2^13218368 is an apocalyptic number.

It is an amenable number.

13218368 is a deficient number, since it is larger than the sum of its proper divisors (13151404).

13218368 is an equidigital number, since it uses as much as digits as its factorization.

13218368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1100 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 13218368 is about 3635.7073589606. The cubic root of 13218368 is about 236.4427196730.

Adding to 13218368 its reverse (86381231), we get a palindrome (99599599).

The spelling of 13218368 in words is "thirteen million, two hundred eighteen thousand, three hundred sixty-eight".