21304330044 has 48 divisors (see below), whose sum is σ = 49941889536. Its totient is φ = 7068384000.

The previous prime is 21304330039. The next prime is 21304330049. The reversal of 21304330044 is 44003340312.

It is an interprime number because it is at equal distance from previous prime (21304330039) and next prime (21304330049).

It is a junction number, because it is equal to n+sod(n) for n = 21304329996 and 21304330023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304330049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4215319 + ... + 4220369.

It is an arithmetic number, because the mean of its divisors is an integer number (1040456032).

Almost surely, 2^21304330044 is an apocalyptic number.

It is an amenable number.

21304330044 is an abundant number, since it is smaller than the sum of its proper divisors (28637559492).

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

21304330044 is a wasteful number, since it uses less digits than its factorization.

21304330044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6626 (or 6624 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21304330044 its reverse (44003340312), we get a palindrome (65307670356).

The spelling of 21304330044 in words is "twenty-one billion, three hundred four million, three hundred thirty thousand, forty-four".