13240967618 has 4 divisors (see below), whose sum is σ = 19861451430. Its totient is φ = 6620483808.

The previous prime is 13240967587. The next prime is 13240967629. The reversal of 13240967618 is 81676904231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9649722289 + 3591245329 = 98233^2 + 59927^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310241903 + ... + 3310241906.

Almost surely, 2^13240967618 is an apocalyptic number.

13240967618 is a deficient number, since it is larger than the sum of its proper divisors (6620483812).

13240967618 is an equidigital number, since it uses as much as digits as its factorization.

13240967618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620483811.

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 13240967618 in words is "thirteen billion, two hundred forty million, nine hundred sixty-seven thousand, six hundred eighteen".