20320270813 has 2 divisors, whose sum is σ = 20320270814. Its totient is φ = 20320270812.

The previous prime is 20320270807. The next prime is 20320270829. The reversal of 20320270813 is 31807202302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17249670244 + 3070600569 = 131338^2 + 55413^2 .

It is a cyclic number.

It is not a de Polignac number, because 20320270813 - 2²⁹ = 19783399901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320250813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160135406 + 10160135407.

It is an arithmetic number, because the mean of its divisors is an integer number (10160135407).

Almost surely, 2^20320270813 is an apocalyptic number.

It is an amenable number.

20320270813 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320270813 is an equidigital number, since it uses as much as digits as its factorization.

20320270813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 20320270813 in words is "twenty billion, three hundred twenty million, two hundred seventy thousand, eight hundred thirteen".