21444300244 has 12 divisors (see below), whose sum is σ = 38163585600. Its totient is φ = 10540418648.

The previous prime is 21444300211. The next prime is 21444300301. The reversal of 21444300244 is 44200344412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45432604 + ... + 45433075.

It is an arithmetic number, because the mean of its divisors is an integer number (3180298800).

Almost surely, 2^21444300244 is an apocalyptic number.

It is an amenable number.

21444300244 is a deficient number, since it is larger than the sum of its proper divisors (16719285356).

21444300244 is a wasteful number, since it uses less digits than its factorization.

21444300244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90865742 (or 90865740 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 21444300244 its reverse (44200344412), we get a palindrome (65644644656).

The spelling of 21444300244 in words is "twenty-one billion, four hundred forty-four million, three hundred thousand, two hundred forty-four".