21404024344 has 16 divisors (see below), whose sum is σ = 41065861320. Its totient is φ = 10453128000.

The previous prime is 21404024311. The next prime is 21404024347. The reversal of 21404024344 is 44342040412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404024347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31110157 + ... + 31110844.

Almost surely, 2^21404024344 is an apocalyptic number.

It is an amenable number.

21404024344 is a deficient number, since it is larger than the sum of its proper divisors (19661836976).

21404024344 is a wasteful number, since it uses less digits than its factorization.

21404024344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62221050 (or 62221046 counting only the distinct ones).

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

Adding to 21404024344 its reverse (44342040412), we get a palindrome (65746064756).

The spelling of 21404024344 in words is "twenty-one billion, four hundred four million, twenty-four thousand, three hundred forty-four".