20020171 has 2 divisors, whose sum is σ = 20020172. Its totient is φ = 20020170.

The previous prime is 20020163. The next prime is 20020199. The reversal of 20020171 is 17102002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20020171 - 2³ = 20020163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20020151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010085 + 10010086.

It is an arithmetic number, because the mean of its divisors is an integer number (10010086).

Almost surely, 2^20020171 is an apocalyptic number.

20020171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020171 is an equidigital number, since it uses as much as digits as its factorization.

20020171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 20020171 is about 4474.3905730278. The cubic root of 20020171 is about 271.5329851948.

Adding to 20020171 its reverse (17102002), we get a palindrome (37122173).

The spelling of 20020171 in words is "twenty million, twenty thousand, one hundred seventy-one".