20836085 has 8 divisors (see below), whose sum is σ = 25261656. Its totient is φ = 16496640.

The previous prime is 20836073. The next prime is 20836111. The reversal of 20836085 is 58063802.

It can be written as a sum of positive squares in 4 ways, for example, as 106276 + 20729809 = 326^2 + 4553^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-20836085 is a prime.

It is a Duffinian 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, 20996 + ... + 21965.

It is an arithmetic number, because the mean of its divisors is an integer number (3157707).

Almost surely, 2^20836085 is an apocalyptic number.

It is an amenable number.

20836085 is a deficient number, since it is larger than the sum of its proper divisors (4425571).

20836085 is an equidigital number, since it uses as much as digits as its factorization.

20836085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43063.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20836085 is about 4564.6560659046. The cubic root of 20836085 is about 275.1727179454.

Adding to 20836085 its reverse (58063802), we get a palindrome (78899887).

The spelling of 20836085 in words is "twenty million, eight hundred thirty-six thousand, eighty-five".