21444823792 has 20 divisors (see below), whose sum is σ = 47484967216. Its totient is φ = 9190638720.

The previous prime is 21444823783. The next prime is 21444823811. The reversal of 21444823792 is 29732844412.

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, 95735709 + ... + 95735932.

Almost surely, 2^21444823792 is an apocalyptic number.

It is an amenable number.

21444823792 is an abundant number, since it is smaller than the sum of its proper divisors (26040143424).

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

21444823792 is a wasteful number, since it uses less digits than its factorization.

21444823792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191471656 (or 191471650 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The spelling of 21444823792 in words is "twenty-one billion, four hundred forty-four million, eight hundred twenty-three thousand, seven hundred ninety-two".