20003317 has 2 divisors, whose sum is σ = 20003318. Its totient is φ = 20003316.

The previous prime is 20003297. The next prime is 20003369. The reversal of 20003317 is 71330002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18541636 + 1461681 = 4306^2 + 1209^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003317 - 2¹¹ = 20001269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20003317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001658 + 10001659.

It is an arithmetic number, because the mean of its divisors is an integer number (10001659).

Almost surely, 2^20003317 is an apocalyptic number.

It is an amenable number.

20003317 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003317 is an equidigital number, since it uses as much as digits as its factorization.

20003317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 20003317 is about 4472.5067914985. The cubic root of 20003317 is about 271.4567670354.

Adding to 20003317 its reverse (71330002), we get a palindrome (91333319).

The spelling of 20003317 in words is "twenty million, three thousand, three hundred seventeen".