20533254317 has 2 divisors, whose sum is σ = 20533254318. Its totient is φ = 20533254316.

The previous prime is 20533254293. The next prime is 20533254319. The reversal of 20533254317 is 71345233502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10702730116 + 9830524201 = 103454^2 + 99149^2 .

It is a cyclic number.

It is not a de Polignac number, because 20533254317 - 2²⁰ = 20532205741 is a prime.

It is a super-2 number, since 2×20533254317² (a number of 21 digits) contains 22 as substring.

Together with 20533254319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20533254319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10266627158 + 10266627159.

It is an arithmetic number, because the mean of its divisors is an integer number (10266627159).

Almost surely, 2^20533254317 is an apocalyptic number.

It is an amenable number.

20533254317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20533254317 is an equidigital number, since it uses as much as digits as its factorization.

20533254317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 35.

Adding to 20533254317 its reverse (71345233502), we get a palindrome (91878487819).

The spelling of 20533254317 in words is "twenty billion, five hundred thirty-three million, two hundred fifty-four thousand, three hundred seventeen".