12537388931 has 4 divisors (see below), whose sum is σ = 12941820864. Its totient is φ = 12132957000.

The previous prime is 12537388907. The next prime is 12537388933. The reversal of 12537388931 is 13988373521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12537388931 is a prime.

It is a super-2 number, since 2×12537388931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12537388931.

It is not an unprimeable number, because it can be changed into a prime (12537388933) 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 3 ways as a sum of consecutive naturals, for example, 202215920 + ... + 202215981.

It is an arithmetic number, because the mean of its divisors is an integer number (3235455216).

Almost surely, 2^12537388931 is an apocalyptic number.

12537388931 is a deficient number, since it is larger than the sum of its proper divisors (404431933).

12537388931 is an equidigital number, since it uses as much as digits as its factorization.

12537388931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404431932.

The product of its digits is 1088640, while the sum is 50.

The spelling of 12537388931 in words is "twelve billion, five hundred thirty-seven million, three hundred eighty-eight thousand, nine hundred thirty-one".