20310021313 has 4 divisors (see below), whose sum is σ = 20356927108. Its totient is φ = 20263115520.

The previous prime is 20310021307. The next prime is 20310021323. The reversal of 20310021313 is 31312001302.

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 12834170944 + 7475850369 = 113288^2 + 86463^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20310021313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20310021323) 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, 23452248 + ... + 23453113.

It is an arithmetic number, because the mean of its divisors is an integer number (5089231777).

Almost surely, 2^20310021313 is an apocalyptic number.

It is an amenable number.

20310021313 is a deficient number, since it is larger than the sum of its proper divisors (46905795).

20310021313 is an equidigital number, since it uses as much as digits as its factorization.

20310021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46905794.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20310021313 its reverse (31312001302), we get a palindrome (51622022615).

The spelling of 20310021313 in words is "twenty billion, three hundred ten million, twenty-one thousand, three hundred thirteen".