20585255 has 16 divisors (see below), whose sum is σ = 25220160. Its totient is φ = 16127232.

The previous prime is 20585237. The next prime is 20585291. The reversal of 20585255 is 55258502.

It is a cyclic number.

It is not a de Polignac number, because 20585255 - 2¹⁰ = 20584231 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 74177 + ... + 74453.

It is an arithmetic number, because the mean of its divisors is an integer number (1576260).

Almost surely, 2^20585255 is an apocalyptic number.

20585255 is a deficient number, since it is larger than the sum of its proper divisors (4634905).

20585255 is a wasteful number, since it uses less digits than its factorization.

20585255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 20585255 is about 4537.0976405627. The cubic root of 20585255 is about 274.0640578735.

The spelling of 20585255 in words is "twenty million, five hundred eighty-five thousand, two hundred fifty-five".