20665085 has 8 divisors (see below), whose sum is σ = 28340736. Its totient is φ = 14170320.

The previous prime is 20665067. The next prime is 20665093. The reversal of 20665085 is 58056602.

It is a happy number.

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

It is not a de Polignac number, because 20665085 - 2⁸ = 20664829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295181 + ... + 295250.

It is an arithmetic number, because the mean of its divisors is an integer number (3542592).

Almost surely, 2^20665085 is an apocalyptic number.

It is an amenable number.

20665085 is a deficient number, since it is larger than the sum of its proper divisors (7675651).

20665085 is an equidigital number, since it uses as much as digits as its factorization.

20665085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590443.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 20665085 is about 4545.8866021932. The cubic root of 20665085 is about 274.4178760592.

The spelling of 20665085 in words is "twenty million, six hundred sixty-five thousand, eighty-five".