21320023210013 has 16 divisors (see below), whose sum is σ = 23496094111680. Its totient is φ = 19183724448000.

The previous prime is 21320023210007. The next prime is 21320023210021. The reversal of 21320023210013 is 31001232002312.

It is a cyclic number.

It is not a de Polignac number, because 21320023210013 - 2⁴ = 21320023209997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320023210043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325706 + ... + 6538052.

It is an arithmetic number, because the mean of its divisors is an integer number (1468505881980).

Almost surely, 2^{21320023210013} is an apocalyptic number.

It is an amenable number.

21320023210013 is a deficient number, since it is larger than the sum of its proper divisors (2176070901667).

21320023210013 is a wasteful number, since it uses less digits than its factorization.

21320023210013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215548.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21320023210013 its reverse (31001232002312), we get a palindrome (52321255212325).

The spelling of 21320023210013 in words is "twenty-one trillion, three hundred twenty billion, twenty-three million, two hundred ten thousand, thirteen".