20312132317 has 2 divisors, whose sum is σ = 20312132318. Its totient is φ = 20312132316.

The previous prime is 20312132299. The next prime is 20312132329. The reversal of 20312132317 is 71323121302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14474255481 + 5837876836 = 120309^2 + 76406^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312132317 - 2¹⁹ = 20311608029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20312132291 and 20312132300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312732317) 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, 10156066158 + 10156066159.

It is an arithmetic number, because the mean of its divisors is an integer number (10156066159).

Almost surely, 2^20312132317 is an apocalyptic number.

It is an amenable number.

20312132317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312132317 is an equidigital number, since it uses as much as digits as its factorization.

20312132317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

Adding to 20312132317 its reverse (71323121302), we get a palindrome (91635253619).

The spelling of 20312132317 in words is "twenty billion, three hundred twelve million, one hundred thirty-two thousand, three hundred seventeen".