20208585 has 16 divisors (see below), whose sum is σ = 32656320. Its totient is φ = 10670400.

The previous prime is 20208583. The next prime is 20208611. The reversal of 20208585 is 58580202.

It is not a de Polignac number, because 20208585 - 2¹ = 20208583 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20208583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5155 + ... + 8184.

It is an arithmetic number, because the mean of its divisors is an integer number (2041020).

Almost surely, 2^20208585 is an apocalyptic number.

It is an amenable number.

20208585 is a deficient number, since it is larger than the sum of its proper divisors (12447735).

20208585 is a wasteful number, since it uses less digits than its factorization.

20208585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13448.

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 20208585 is about 4495.3959781092. The cubic root of 20208585 is about 272.3821446979.

Adding to 20208585 its reverse (58580202), we get a palindrome (78788787).

The spelling of 20208585 in words is "twenty million, two hundred eight thousand, five hundred eighty-five".