20583217 has 2 divisors, whose sum is σ = 20583218. Its totient is φ = 20583216.

The previous prime is 20583191. The next prime is 20583221. The reversal of 20583217 is 71238502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 7921 = 4536^2 + 89^2 .

It is a cyclic number.

It is not a de Polignac number, because 20583217 - 2⁷ = 20583089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20583317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10291608 + 10291609.

It is an arithmetic number, because the mean of its divisors is an integer number (10291609).

Almost surely, 2^20583217 is an apocalyptic number.

It is an amenable number.

20583217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20583217 is an equidigital number, since it uses as much as digits as its factorization.

20583217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 20583217 is about 4536.8730420853. The cubic root of 20583217 is about 274.0550131959.

The spelling of 20583217 in words is "twenty million, five hundred eighty-three thousand, two hundred seventeen".