20310210317 has 2 divisors, whose sum is σ = 20310210318. Its totient is φ = 20310210316.

The previous prime is 20310210313. The next prime is 20310210337. The reversal of 20310210317 is 71301201302.

It is an a-pointer prime, because the next prime (20310210337) can be obtained adding 20310210317 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20264661316 + 45549001 = 142354^2 + 6749^2 .

It is a cyclic number.

It is not a de Polignac number, because 20310210317 - 2² = 20310210313 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20310210313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155105158 + 10155105159.

It is an arithmetic number, because the mean of its divisors is an integer number (10155105159).

Almost surely, 2^20310210317 is an apocalyptic number.

It is an amenable number.

20310210317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20310210317 is an equidigital number, since it uses as much as digits as its factorization.

20310210317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

Adding to 20310210317 its reverse (71301201302), we get a palindrome (91611411619).

The spelling of 20310210317 in words is "twenty billion, three hundred ten million, two hundred ten thousand, three hundred seventeen".