22444244421 has 4 divisors (see below), whose sum is σ = 29925659232. Its totient is φ = 14962829612.

The previous prime is 22444244359. The next prime is 22444244453. The reversal of 22444244421 is 12444244422.

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 a cyclic number.

It is not a de Polignac number, because 22444244421 - 2⁹ = 22444243909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22444244521) 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, 3740707401 + ... + 3740707406.

It is an arithmetic number, because the mean of its divisors is an integer number (7481414808).

Almost surely, 2^22444244421 is an apocalyptic number.

It is an amenable number.

22444244421 is a deficient number, since it is larger than the sum of its proper divisors (7481414811).

22444244421 is an equidigital number, since it uses as much as digits as its factorization.

22444244421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7481414810.

The product of its digits is 65536, while the sum is 33.

Adding to 22444244421 its reverse (12444244422), we get a palindrome (34888488843).

Subtracting from 22444244421 its reverse (12444244422), we obtain a palindrome (9999999999).

The spelling of 22444244421 in words is "twenty-two billion, four hundred forty-four million, two hundred forty-four thousand, four hundred twenty-one".