20311113313 has 2 divisors, whose sum is σ = 20311113314. Its totient is φ = 20311113312.

The previous prime is 20311113289. The next prime is 20311113359. The reversal of 20311113313 is 31331111302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16502742369 + 3808370944 = 128463^2 + 61712^2 .

It is a cyclic number.

It is not a de Polignac number, because 20311113313 - 2²⁹ = 19774242401 is a prime.

It is not a weakly prime, because it can be changed into another prime (20311116313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155556656 + 10155556657.

It is an arithmetic number, because the mean of its divisors is an integer number (10155556657).

Almost surely, 2^20311113313 is an apocalyptic number.

It is an amenable number.

20311113313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311113313 is an equidigital number, since it uses as much as digits as its factorization.

20311113313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 20311113313 its reverse (31331111302), we get a palindrome (51642224615).

The spelling of 20311113313 in words is "twenty billion, three hundred eleven million, one hundred thirteen thousand, three hundred thirteen".