21004330304 has 28 divisors (see below), whose sum is σ = 41727571104. Its totient is φ = 10490296704.

The previous prime is 21004330267. The next prime is 21004330313. The reversal of 21004330304 is 40303340012.

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, 128234 + ... + 241769.

Almost surely, 2^21004330304 is an apocalyptic number.

It is an amenable number.

21004330304 is a deficient number, since it is larger than the sum of its proper divisors (20723240800).

21004330304 is an equidigital number, since it uses as much as digits as its factorization.

21004330304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370902 (or 370892 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21004330304 its reverse (40303340012), we get a palindrome (61307670316).

The spelling of 21004330304 in words is "twenty-one billion, four million, three hundred thirty thousand, three hundred four".