21320104305 has 8 divisors (see below), whose sum is σ = 34112166912. Its totient is φ = 11370722288.

The previous prime is 21320104301. The next prime is 21320104313. The reversal of 21320104305 is 50340102312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21320104305 - 2² = 21320104301 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21320104301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710670129 + ... + 710670158.

It is an arithmetic number, because the mean of its divisors is an integer number (4264020864).

Almost surely, 2^21320104305 is an apocalyptic number.

It is an amenable number.

21320104305 is a deficient number, since it is larger than the sum of its proper divisors (12792062607).

21320104305 is a wasteful number, since it uses less digits than its factorization.

21320104305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421340295.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 21320104305 its reverse (50340102312), we get a palindrome (71660206617).

The spelling of 21320104305 in words is "twenty-one billion, three hundred twenty million, one hundred four thousand, three hundred five".