21302320213013 has 24 divisors (see below), whose sum is σ = 26275341792024. Its totient is φ = 17160549504000.

The previous prime is 21302320212941. The next prime is 21302320213019. The reversal of 21302320213013 is 31031202320312.

It can be written as a sum of positive squares in 4 ways, for example, as 16840246993969 + 4462073219044 = 4103687^2 + 2112362^2 .

It is not a de Polignac number, because 21302320213013 - 2²⁰ = 21302319164437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21302320213013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302320213019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17656448 + ... + 18824313.

It is an arithmetic number, because the mean of its divisors is an integer number (1094805908001).

Almost surely, 2^{21302320213013} is an apocalyptic number.

It is an amenable number.

21302320213013 is a deficient number, since it is larger than the sum of its proper divisors (4973021579011).

21302320213013 is a wasteful number, since it uses less digits than its factorization.

21302320213013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36481493 (or 36481486 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21302320213013 its reverse (31031202320312), we get a palindrome (52333522533325).

The spelling of 21302320213013 in words is "twenty-one trillion, three hundred two billion, three hundred twenty million, two hundred thirteen thousand, thirteen".