12381938439 has 32 divisors (see below), whose sum is σ = 18408757248. Its totient is φ = 7351344000.

The previous prime is 12381938431. The next prime is 12381938441. The reversal of 12381938439 is 93483918321.

It is not a de Polignac number, because 12381938439 - 2³ = 12381938431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12381938391 and 12381938400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381938431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 384709 + ... + 415649.

It is an arithmetic number, because the mean of its divisors is an integer number (575273664).

Almost surely, 2^12381938439 is an apocalyptic number.

12381938439 is a deficient number, since it is larger than the sum of its proper divisors (6026818809).

12381938439 is a wasteful number, since it uses less digits than its factorization.

12381938439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31319.

The product of its digits is 1119744, while the sum is 51.

The spelling of 12381938439 in words is "twelve billion, three hundred eighty-one million, nine hundred thirty-eight thousand, four hundred thirty-nine".