20328585 has 16 divisors (see below), whose sum is σ = 32655744. Its totient is φ = 10798592.

The previous prime is 20328569. The next prime is 20328589. The reversal of 20328585 is 58582302.

It is a cyclic number.

It is not a de Polignac number, because 20328585 - 2⁴ = 20328569 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20328589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1369 + ... + 6521.

It is an arithmetic number, because the mean of its divisors is an integer number (2040984).

Almost surely, 2^20328585 is an apocalyptic number.

It is an amenable number.

20328585 is a deficient number, since it is larger than the sum of its proper divisors (12327159).

20328585 is a wasteful number, since it uses less digits than its factorization.

20328585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5424.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 20328585 is about 4508.7232117308. The cubic root of 20328585 is about 272.9202224996.

The spelling of 20328585 in words is "twenty million, three hundred twenty-eight thousand, five hundred eighty-five".