21234422344 has 16 divisors (see below), whose sum is σ = 41910044400. Its totient is φ = 10058410512.

The previous prime is 21234422323. The next prime is 21234422351. The reversal of 21234422344 is 44322443212.

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, 69849922 + ... + 69850225.

It is an arithmetic number, because the mean of its divisors is an integer number (2619377775).

Almost surely, 2^21234422344 is an apocalyptic number.

It is an amenable number.

21234422344 is a deficient number, since it is larger than the sum of its proper divisors (20675622056).

21234422344 is a wasteful number, since it uses less digits than its factorization.

21234422344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139700172 (or 139700168 counting only the distinct ones).

The product of its digits is 36864, while the sum is 31.

Adding to 21234422344 its reverse (44322443212), we get a palindrome (65556865556).

The spelling of 21234422344 in words is "twenty-one billion, two hundred thirty-four million, four hundred twenty-two thousand, three hundred forty-four".