20313032013 has 10 divisors (see below), whose sum is σ = 30344159054. Its totient is φ = 13542021288.

The previous prime is 20313032011. The next prime is 20313032017. The reversal of 20313032013 is 31023031302.

20313032013 is a `hidden beast` number, since 20 + 313 + 0 + 320 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15778625769 + 4534406244 = 125613^2 + 67338^2 .

It is not a de Polignac number, because 20313032013 - 2¹ = 20313032011 is a prime.

It is a super-2 number, since 2×20313032013² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313032011) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 125389006 + ... + 125389167.

Almost surely, 2^20313032013 is an apocalyptic number.

It is an amenable number.

20313032013 is a deficient number, since it is larger than the sum of its proper divisors (10031127041).

20313032013 is an equidigital number, since it uses as much as digits as its factorization.

20313032013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250778185 (or 250778176 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 20313032013 its reverse (31023031302), we get a palindrome (51336063315).

The spelling of 20313032013 in words is "twenty billion, three hundred thirteen million, thirty-two thousand, thirteen".