13313618 has 16 divisors (see below), whose sum is σ = 21360024. Its totient is φ = 6201600.

The previous prime is 13313611. The next prime is 13313647. The reversal of 13313618 is 81631331.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13227769 + 85849 = 3637^2 + 293^2 .

It is not an unprimeable number, because it can be changed into a prime (13313611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1496 + ... + 5372.

Almost surely, 2^13313618 is an apocalyptic number.

13313618 is a deficient number, since it is larger than the sum of its proper divisors (8046406).

13313618 is a wasteful number, since it uses less digits than its factorization.

13313618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3997.

The product of its digits is 1296, while the sum is 26.

The square root of 13313618 is about 3648.7830848106. The cubic root of 13313618 is about 237.0092870841.

Adding to 13313618 its reverse (81631331), we get a palindrome (94944949).

It can be divided in two parts, 13313 and 618, that added together give a palindrome (13931).

The spelling of 13313618 in words is "thirteen million, three hundred thirteen thousand, six hundred eighteen".