21304246332 has 24 divisors (see below), whose sum is σ = 50202088272. Its totient is φ = 7031104000.

The previous prime is 21304246321. The next prime is 21304246349. The reversal of 21304246332 is 23364240312.

It is a self number, because there is not a number n which added to its sum of digits gives 21304246332.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8787669 + ... + 8790092.

It is an arithmetic number, because the mean of its divisors is an integer number (2091753678).

Almost surely, 2^21304246332 is an apocalyptic number.

It is an amenable number.

21304246332 is an abundant number, since it is smaller than the sum of its proper divisors (28897841940).

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

21304246332 is a wasteful number, since it uses less digits than its factorization.

21304246332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17577869 (or 17577867 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 21304246332 its reverse (23364240312), we get a palindrome (44668486644).

The spelling of 21304246332 in words is "twenty-one billion, three hundred four million, two hundred forty-six thousand, three hundred thirty-two".