20311132013 has 2 divisors, whose sum is σ = 20311132014. Its totient is φ = 20311132012.

The previous prime is 20311131977. The next prime is 20311132033. The reversal of 20311132013 is 31023111302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15416450569 + 4894681444 = 124163^2 + 69962^2 .

It is a cyclic number.

It is not a de Polignac number, because 20311132013 - 2¹⁰ = 20311130989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20311131982 and 20311132000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311132033) 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, 10155566006 + 10155566007.

It is an arithmetic number, because the mean of its divisors is an integer number (10155566007).

Almost surely, 2^20311132013 is an apocalyptic number.

It is an amenable number.

20311132013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311132013 is an equidigital number, since it uses as much as digits as its factorization.

20311132013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20311132013 its reverse (31023111302), we get a palindrome (51334243315).

The spelling of 20311132013 in words is "twenty billion, three hundred eleven million, one hundred thirty-two thousand, thirteen".