12693842618 has 4 divisors (see below), whose sum is σ = 19040763930. Its totient is φ = 6346921308.

The previous prime is 12693842617. The next prime is 12693842621. The reversal of 12693842618 is 81624839621.

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., 8819651569 + 3874191049 = 93913^2 + 62243^2 .

It is a super-2 number, since 2×12693842618² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12693842617) by changing a digit.

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, 3173460653 + ... + 3173460656.

Almost surely, 2^12693842618 is an apocalyptic number.

12693842618 is a deficient number, since it is larger than the sum of its proper divisors (6346921312).

12693842618 is an equidigital number, since it uses as much as digits as its factorization.

12693842618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6346921311.

The product of its digits is 995328, while the sum is 50.

The spelling of 12693842618 in words is "twelve billion, six hundred ninety-three million, eight hundred forty-two thousand, six hundred eighteen".