12423444436 has 48 divisors (see below), whose sum is σ = 23891220864. Its totient is φ = 5617213056.

The previous prime is 12423444391. The next prime is 12423444479. The reversal of 12423444436 is 63444432421.

It is a junction number, because it is equal to n+sod(n) for n = 12423444395 and 12423444404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2044675 + ... + 2050741.

It is an arithmetic number, because the mean of its divisors is an integer number (497733768).

Almost surely, 2^12423444436 is an apocalyptic number.

It is an amenable number.

12423444436 is a deficient number, since it is larger than the sum of its proper divisors (11467776428).

12423444436 is a wasteful number, since it uses less digits than its factorization.

12423444436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6880 (or 6878 counting only the distinct ones).

The product of its digits is 221184, while the sum is 37.

Adding to 12423444436 its reverse (63444432421), we get a palindrome (75867876857).

The spelling of 12423444436 in words is "twelve billion, four hundred twenty-three million, four hundred forty-four thousand, four hundred thirty-six".