20008205 has 32 divisors (see below), whose sum is σ = 28643328. Its totient is φ = 13132800.

The previous prime is 20008199. The next prime is 20008207. The reversal of 20008205 is 50280002.

It is a happy number.

It is not a de Polignac number, because 20008205 - 2⁶ = 20008141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20008207) 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 in 31 ways as a sum of consecutive naturals, for example, 104660 + ... + 104850.

It is an arithmetic number, because the mean of its divisors is an integer number (895104).

Almost surely, 2^20008205 is an apocalyptic number.

It is an amenable number.

20008205 is a deficient number, since it is larger than the sum of its proper divisors (8635123).

20008205 is a wasteful number, since it uses less digits than its factorization.

20008205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 20008205 is about 4473.0532078213. The cubic root of 20008205 is about 271.4788762454.

Adding to 20008205 its reverse (50280002), we get a palindrome (70288207).

The spelling of 20008205 in words is "twenty million, eight thousand, two hundred five".