21033224344 has 16 divisors (see below), whose sum is σ = 43022504520. Its totient is φ = 9560556480.

The previous prime is 21033224339. The next prime is 21033224357. The reversal of 21033224344 is 44342233012.

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, 119506869 + ... + 119507044.

Almost surely, 2^21033224344 is an apocalyptic number.

It is an amenable number.

21033224344 is an abundant number, since it is smaller than the sum of its proper divisors (21989280176).

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

21033224344 is a wasteful number, since it uses less digits than its factorization.

21033224344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239013930 (or 239013926 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21033224344 its reverse (44342233012), we get a palindrome (65375457356).

The spelling of 21033224344 in words is "twenty-one billion, thirty-three million, two hundred twenty-four thousand, three hundred forty-four".