20117173 has 2 divisors, whose sum is σ = 20117174. Its totient is φ = 20117172.

The previous prime is 20117161. The next prime is 20117179. The reversal of 20117173 is 37171102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13527684 + 6589489 = 3678^2 + 2567^2 .

It is a cyclic number.

It is not a de Polignac number, because 20117173 - 2¹³ = 20108981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20117179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10058586 + 10058587.

It is an arithmetic number, because the mean of its divisors is an integer number (10058587).

Almost surely, 2^20117173 is an apocalyptic number.

It is an amenable number.

20117173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20117173 is an equidigital number, since it uses as much as digits as its factorization.

20117173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 20117173 is about 4485.2171630814. The cubic root of 20117173 is about 271.9708238962.

Adding to 20117173 its reverse (37171102), we get a palindrome (57288275).

The spelling of 20117173 in words is "twenty million, one hundred seventeen thousand, one hundred seventy-three".