12047031613 has 18 divisors (see below), whose sum is σ = 12795108858. Its totient is φ = 11342086560.

The previous prime is 12047031593. The next prime is 12047031649. The reversal of 12047031613 is 31613074021.

It can be written as a sum of positive squares in 3 ways, for example, as 4306903129 + 7740128484 = 65627^2 + 87978^2 .

It is a de Polignac number, because none of the positive numbers 2^k-12047031613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12047038613) 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 in 17 ways as a sum of consecutive naturals, for example, 1311031 + ... + 1320187.

It is an arithmetic number, because the mean of its divisors is an integer number (710839381).

Almost surely, 2^12047031613 is an apocalyptic number.

It is an amenable number.

12047031613 is a deficient number, since it is larger than the sum of its proper divisors (748077245).

12047031613 is an frugal number, since it uses more digits than its factorization.

12047031613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9293 (or 9225 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The spelling of 12047031613 in words is "twelve billion, forty-seven million, thirty-one thousand, six hundred thirteen".