22431344421 has 4 divisors (see below), whose sum is σ = 29908459232. Its totient is φ = 14954229612.

The previous prime is 22431344407. The next prime is 22431344471. The reversal of 22431344421 is 12444313422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22431344421 - 2¹⁰ = 22431343397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431344471) 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, 3738557401 + ... + 3738557406.

It is an arithmetic number, because the mean of its divisors is an integer number (7477114808).

Almost surely, 2^22431344421 is an apocalyptic number.

It is an amenable number.

22431344421 is a deficient number, since it is larger than the sum of its proper divisors (7477114811).

22431344421 is an equidigital number, since it uses as much as digits as its factorization.

22431344421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7477114810.

The product of its digits is 18432, while the sum is 30.

Adding to 22431344421 its reverse (12444313422), we get a palindrome (34875657843).

The spelling of 22431344421 in words is "twenty-two billion, four hundred thirty-one million, three hundred forty-four thousand, four hundred twenty-one".