20350217 has 2 divisors, whose sum is σ = 20350218. Its totient is φ = 20350216.

The previous prime is 20350181. The next prime is 20350243. The reversal of 20350217 is 71205302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12222016 + 8128201 = 3496^2 + 2851^2 .

It is a cyclic number.

It is not a de Polignac number, because 20350217 - 2⁸ = 20349961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20350277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10175108 + 10175109.

It is an arithmetic number, because the mean of its divisors is an integer number (10175109).

Almost surely, 2^20350217 is an apocalyptic number.

It is an amenable number.

20350217 is a deficient number, since it is larger than the sum of its proper divisors (1).

20350217 is an equidigital number, since it uses as much as digits as its factorization.

20350217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 20350217 is about 4511.1214791890. The cubic root of 20350217 is about 273.0169945634.

Adding to 20350217 its reverse (71205302), we get a palindrome (91555519).

The spelling of 20350217 in words is "twenty million, three hundred fifty thousand, two hundred seventeen".