23404212443 has 4 divisors (see below), whose sum is σ = 24780930840. Its totient is φ = 22027494048.

The previous prime is 23404212367. The next prime is 23404212457. The reversal of 23404212443 is 34421240432.

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

It is a de Polignac number, because none of the positive numbers 2^k-23404212443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23404242443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688359173 + ... + 688359206.

It is an arithmetic number, because the mean of its divisors is an integer number (6195232710).

Almost surely, 2^23404212443 is an apocalyptic number.

23404212443 is a deficient number, since it is larger than the sum of its proper divisors (1376718397).

23404212443 is a wasteful number, since it uses less digits than its factorization.

23404212443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376718396.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 23404212443 its reverse (34421240432), we get a palindrome (57825452875).

The spelling of 23404212443 in words is "twenty-three billion, four hundred four million, two hundred twelve thousand, four hundred forty-three".