12523431423 has 4 divisors (see below), whose sum is σ = 16697908568. Its totient is φ = 8348954280.

The previous prime is 12523431409. The next prime is 12523431433. The reversal of 12523431423 is 32413432521.

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

It is not a de Polignac number, because 12523431423 - 2⁴ = 12523431407 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 (12523431433) 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, 2087238568 + ... + 2087238573.

It is an arithmetic number, because the mean of its divisors is an integer number (4174477142).

Almost surely, 2^12523431423 is an apocalyptic number.

12523431423 is a deficient number, since it is larger than the sum of its proper divisors (4174477145).

12523431423 is an equidigital number, since it uses as much as digits as its factorization.

12523431423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174477144.

The product of its digits is 17280, while the sum is 30.

Adding to 12523431423 its reverse (32413432521), we get a palindrome (44936863944).

The spelling of 12523431423 in words is "twelve billion, five hundred twenty-three million, four hundred thirty-one thousand, four hundred twenty-three".