20320213013 has 2 divisors, whose sum is σ = 20320213014. Its totient is φ = 20320213012.

The previous prime is 20320213009. The next prime is 20320213027. The reversal of 20320213013 is 31031202302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10563317284 + 9756895729 = 102778^2 + 98777^2 .

It is a cyclic number.

It is not a de Polignac number, because 20320213013 - 2² = 20320213009 is a prime.

It is a super-2 number, since 2×20320213013² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20320212982 and 20320213000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320213003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10160106506 + 10160106507.

It is an arithmetic number, because the mean of its divisors is an integer number (10160106507).

Almost surely, 2^20320213013 is an apocalyptic number.

It is an amenable number.

20320213013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320213013 is an equidigital number, since it uses as much as digits as its factorization.

20320213013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20320213013 its reverse (31031202302), we get a palindrome (51351415315).

The spelling of 20320213013 in words is "twenty billion, three hundred twenty million, two hundred thirteen thousand, thirteen".