21302320233013 has 4 divisors (see below), whose sum is σ = 21513234294828. Its totient is φ = 21091406171200.

The previous prime is 21302320232951. The next prime is 21302320233067. The reversal of 21302320233013 is 31033202320312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12138973714609 + 9163346518404 = 3484103^2 + 3027102^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302320233013 - 2¹⁷ = 21302320101941 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 (21302320233713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105457030756 + ... + 105457030957.

It is an arithmetic number, because the mean of its divisors is an integer number (5378308573707).

Almost surely, 2^{21302320233013} is an apocalyptic number.

It is an amenable number.

21302320233013 is a deficient number, since it is larger than the sum of its proper divisors (210914061815).

21302320233013 is a wasteful number, since it uses less digits than its factorization.

21302320233013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210914061814.

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

Adding to 21302320233013 its reverse (31033202320312), we get a palindrome (52335522553325).

The spelling of 21302320233013 in words is "twenty-one trillion, three hundred two billion, three hundred twenty million, two hundred thirty-three thousand, thirteen".