21444342222 has 8 divisors (see below), whose sum is σ = 42888684456. Its totient is φ = 7148114072.

The previous prime is 21444342187. The next prime is 21444342251. The reversal of 21444342222 is 22224344412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

21444342222 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21444342222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787028513 + ... + 1787028524.

It is an arithmetic number, because the mean of its divisors is an integer number (5361085557).

Almost surely, 2^21444342222 is an apocalyptic number.

21444342222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21444342222 is a wasteful number, since it uses less digits than its factorization.

21444342222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3574057042.

The product of its digits is 24576, while the sum is 30.

Adding to 21444342222 its reverse (22224344412), we get a palindrome (43668686634).

The spelling of 21444342222 in words is "twenty-one billion, four hundred forty-four million, three hundred forty-two thousand, two hundred twenty-two".