21304212304 has 20 divisors (see below), whose sum is σ = 41286558880. Its totient is φ = 10649616480.

The previous prime is 21304212227. The next prime is 21304212313. The reversal of 21304212304 is 40321240312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84012 + ... + 222859.

It is an arithmetic number, because the mean of its divisors is an integer number (2064327944).

Almost surely, 2^21304212304 is an apocalyptic number.

It is an amenable number.

21304212304 is a deficient number, since it is larger than the sum of its proper divisors (19982346576).

21304212304 is a wasteful number, since it uses less digits than its factorization.

21304212304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311218 (or 311212 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21304212304 its reverse (40321240312), we get a palindrome (61625452616).

The spelling of 21304212304 in words is "twenty-one billion, three hundred four million, two hundred twelve thousand, three hundred four".