21321333304 has 8 divisors (see below), whose sum is σ = 39977499960. Its totient is φ = 10660666648.

The previous prime is 21321333289. The next prime is 21321333337. The reversal of 21321333304 is 40333312312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332583324 + ... + 1332583339.

It is an arithmetic number, because the mean of its divisors is an integer number (4997187495).

Almost surely, 2^21321333304 is an apocalyptic number.

It is an amenable number.

21321333304 is a deficient number, since it is larger than the sum of its proper divisors (18656166656).

21321333304 is a wasteful number, since it uses less digits than its factorization.

21321333304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665166669 (or 2665166665 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21321333304 its reverse (40333312312), we get a palindrome (61654645616).

The spelling of 21321333304 in words is "twenty-one billion, three hundred twenty-one million, three hundred thirty-three thousand, three hundred four".