20203135404317 has 2 divisors, whose sum is σ = 20203135404318. Its totient is φ = 20203135404316.

The previous prime is 20203135404241. The next prime is 20203135404379. The reversal of 20203135404317 is 71340453130202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18289743775801 + 1913391628516 = 4276651^2 + 1383254^2 .

It is a cyclic number.

It is not a de Polignac number, because 20203135404317 - 2⁸ = 20203135404061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20203135403317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101567702158 + 10101567702159.

It is an arithmetic number, because the mean of its divisors is an integer number (10101567702159).

Almost surely, 2^{20203135404317} is an apocalyptic number.

It is an amenable number.

20203135404317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203135404317 is an equidigital number, since it uses as much as digits as its factorization.

20203135404317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 35.

Adding to 20203135404317 its reverse (71340453130202), we get a palindrome (91543588534519).

The spelling of 20203135404317 in words is "twenty trillion, two hundred three billion, one hundred thirty-five million, four hundred four thousand, three hundred seventeen".