13368506618 has 4 divisors (see below), whose sum is σ = 20052759930. Its totient is φ = 6684253308.

The previous prime is 13368506603. The next prime is 13368506663. The reversal of 13368506618 is 81660586331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81660586331 = 34687 ⋅2354213.

It can be written as a sum of positive squares in only one way, i.e., 11237484049 + 2131022569 = 106007^2 + 46163^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3342126653 + ... + 3342126656.

Almost surely, 2^13368506618 is an apocalyptic number.

13368506618 is a deficient number, since it is larger than the sum of its proper divisors (6684253312).

13368506618 is an equidigital number, since it uses as much as digits as its factorization.

13368506618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684253311.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 13368506618 in words is "thirteen billion, three hundred sixty-eight million, five hundred six thousand, six hundred eighteen".