20589285 has 16 divisors (see below), whose sum is σ = 33395904. Its totient is φ = 10829952.

The previous prime is 20589271. The next prime is 20589287. The reversal of 20589285 is 58298502.

It is not a de Polignac number, because 20589285 - 2⁵ = 20589253 is a prime.

It is a super-2 number, since 2×20589285² = 847837313622450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20589287) 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, 8307 + ... + 10496.

It is an arithmetic number, because the mean of its divisors is an integer number (2087244).

Almost surely, 2^20589285 is an apocalyptic number.

It is an amenable number.

20589285 is a deficient number, since it is larger than the sum of its proper divisors (12806619).

20589285 is a wasteful number, since it uses less digits than its factorization.

20589285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18884.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 20589285 is about 4537.5417353453. The cubic root of 20589285 is about 274.0819413227.

The spelling of 20589285 in words is "twenty million, five hundred eighty-nine thousand, two hundred eighty-five".