22543430423 has 4 divisors (see below), whose sum is σ = 23270637888. Its totient is φ = 21816222960.

The previous prime is 22543430417. The next prime is 22543430443. The reversal of 22543430423 is 32403434522.

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 22543430423 - 2³² = 18248463127 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 22543430423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22543430443) 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, 363603686 + ... + 363603747.

It is an arithmetic number, because the mean of its divisors is an integer number (5817659472).

Almost surely, 2^22543430423 is an apocalyptic number.

22543430423 is a deficient number, since it is larger than the sum of its proper divisors (727207465).

22543430423 is an equidigital number, since it uses as much as digits as its factorization.

22543430423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727207464.

The product of its (nonzero) digits is 69120, while the sum is 32.

Adding to 22543430423 its reverse (32403434522), we get a palindrome (54946864945).

The spelling of 22543430423 in words is "twenty-two billion, five hundred forty-three million, four hundred thirty thousand, four hundred twenty-three".