12389815237 has 12 divisors (see below), whose sum is σ = 13733745696. Its totient is φ = 11153996480.

The previous prime is 12389815231. The next prime is 12389815253. The reversal of 12389815237 is 73251898321.

It is not a de Polignac number, because 12389815237 - 2²⁷ = 12255597509 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 (12389815231) 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 11 ways as a sum of consecutive naturals, for example, 925339 + ... + 938632.

It is an arithmetic number, because the mean of its divisors is an integer number (1144478808).

Almost surely, 2^12389815237 is an apocalyptic number.

12389815237 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12389815237 is a deficient number, since it is larger than the sum of its proper divisors (1343930459).

12389815237 is a wasteful number, since it uses less digits than its factorization.

12389815237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864028 (or 1864011 counting only the distinct ones).

The product of its digits is 725760, while the sum is 49.

The spelling of 12389815237 in words is "twelve billion, three hundred eighty-nine million, eight hundred fifteen thousand, two hundred thirty-seven".