12432321423 has 16 divisors (see below), whose sum is σ = 18510816000. Its totient is φ = 8246561400.

The previous prime is 12432321413. The next prime is 12432321439. The reversal of 12432321423 is 32412323421.

12432321423 is a `hidden beast` number, since 1 + 2 + 4 + 3 + 232 + 1 + 423 = 666.

12432321423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12432321423 - 2¹² = 12432317327 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12432321413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1151553 + ... + 1162298.

It is an arithmetic number, because the mean of its divisors is an integer number (1156926000).

Almost surely, 2^12432321423 is an apocalyptic number.

12432321423 is a deficient number, since it is larger than the sum of its proper divisors (6078494577).

12432321423 is a wasteful number, since it uses less digits than its factorization.

12432321423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314059 (or 2314053 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

Adding to 12432321423 its reverse (32412323421), we get a palindrome (44844644844).

The spelling of 12432321423 in words is "twelve billion, four hundred thirty-two million, three hundred twenty-one thousand, four hundred twenty-three".