12438947995 has 4 divisors (see below), whose sum is σ = 14926737600. Its totient is φ = 9951158392.

The previous prime is 12438947977. The next prime is 12438947999. The reversal of 12438947995 is 59974983421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59974983421 = 1093 ⋅54871897.

It is a cyclic number.

It is not a de Polignac number, because 12438947995 - 2¹⁹ = 12438423707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12438947999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1243894795 + ... + 1243894804.

It is an arithmetic number, because the mean of its divisors is an integer number (3731684400).

Almost surely, 2^12438947995 is an apocalyptic number.

12438947995 is a deficient number, since it is larger than the sum of its proper divisors (2487789605).

12438947995 is an equidigital number, since it uses as much as digits as its factorization.

12438947995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487789604.

The product of its digits is 19595520, while the sum is 61.

The spelling of 12438947995 in words is "twelve billion, four hundred thirty-eight million, nine hundred forty-seven thousand, nine hundred ninety-five".