20109585 has 8 divisors (see below), whose sum is σ = 32175360. Its totient is φ = 10725104.

The previous prime is 20109577. The next prime is 20109601. The reversal of 20109585 is 58590102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20109585 - 2³ = 20109577 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 670305 + ... + 670334.

It is an arithmetic number, because the mean of its divisors is an integer number (4021920).

Almost surely, 2^20109585 is an apocalyptic number.

It is an amenable number.

20109585 is a deficient number, since it is larger than the sum of its proper divisors (12065775).

20109585 is a wasteful number, since it uses less digits than its factorization.

20109585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340647.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 20109585 is about 4484.3711933782. The cubic root of 20109585 is about 271.9366246884.

Adding to 20109585 its reverse (58590102), we get a palindrome (78699687).

The spelling of 20109585 in words is "twenty million, one hundred nine thousand, five hundred eighty-five".