20321067317 has 4 divisors (see below), whose sum is σ = 21516424236. Its totient is φ = 19125710400.

The previous prime is 20321067293. The next prime is 20321067413. The reversal of 20321067317 is 71376012302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13837757956 + 6483309361 = 117634^2 + 80519^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321067317 - 2⁸ = 20321067061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321064317) 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 in 3 ways as a sum of consecutive naturals, for example, 597678434 + ... + 597678467.

It is an arithmetic number, because the mean of its divisors is an integer number (5379106059).

Almost surely, 2^20321067317 is an apocalyptic number.

It is an amenable number.

20321067317 is a deficient number, since it is larger than the sum of its proper divisors (1195356919).

20321067317 is a wasteful number, since it uses less digits than its factorization.

20321067317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195356918.

The product of its (nonzero) digits is 10584, while the sum is 32.

Adding to 20321067317 its reverse (71376012302), we get a palindrome (91697079619).

The spelling of 20321067317 in words is "twenty billion, three hundred twenty-one million, sixty-seven thousand, three hundred seventeen".