12423144431 has 16 divisors (see below), whose sum is σ = 12590899200. Its totient is φ = 12256960800.

The previous prime is 12423144427. The next prime is 12423144463. The reversal of 12423144431 is 13444132421.

It is a cyclic number.

It is not a de Polignac number, because 12423144431 - 2² = 12423144427 is a prime.

It is a super-2 number, since 2×12423144431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12423144394 and 12423144403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12423147431) 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, 18851180 + ... + 18851838.

It is an arithmetic number, because the mean of its divisors is an integer number (786931200).

Almost surely, 2^12423144431 is an apocalyptic number.

12423144431 is a deficient number, since it is larger than the sum of its proper divisors (167754769).

12423144431 is a wasteful number, since it uses less digits than its factorization.

12423144431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510.

The product of its digits is 9216, while the sum is 29.

Adding to 12423144431 its reverse (13444132421), we get a palindrome (25867276852).

The spelling of 12423144431 in words is "twelve billion, four hundred twenty-three million, one hundred forty-four thousand, four hundred thirty-one".