12443240023 has 4 divisors (see below), whose sum is σ = 12446279800. Its totient is φ = 12440200248.

The previous prime is 12443240021. The next prime is 12443240053. The reversal of 12443240023 is 32004234421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12443240023 - 2¹ = 12443240021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12443240023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443240021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1513740 + ... + 1521937.

It is an arithmetic number, because the mean of its divisors is an integer number (3111569950).

Almost surely, 2^12443240023 is an apocalyptic number.

12443240023 is a deficient number, since it is larger than the sum of its proper divisors (3039777).

12443240023 is an equidigital number, since it uses as much as digits as its factorization.

12443240023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039776.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 12443240023 its reverse (32004234421), we get a palindrome (44447474444).

The spelling of 12443240023 in words is "twelve billion, four hundred forty-three million, two hundred forty thousand, twenty-three".