12340443423 has 16 divisors (see below), whose sum is σ = 20513984256. Its totient is φ = 6410619840.

The previous prime is 12340443407. The next prime is 12340443433. The reversal of 12340443423 is 32434404321.

It is a happy number.

It is not a de Polignac number, because 12340443423 - 2⁴ = 12340443407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12340443433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26710686 + ... + 26711147.

It is an arithmetic number, because the mean of its divisors is an integer number (1282124016).

Almost surely, 2^12340443423 is an apocalyptic number.

12340443423 is a deficient number, since it is larger than the sum of its proper divisors (8173540833).

12340443423 is a wasteful number, since it uses less digits than its factorization.

12340443423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53421854.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 12340443423 its reverse (32434404321), we get a palindrome (44774847744).

The spelling of 12340443423 in words is "twelve billion, three hundred forty million, four hundred forty-three thousand, four hundred twenty-three".