2085206805 has 48 divisors (see below), whose sum is σ = 3946812480. Its totient is φ = 1010016000.

The previous prime is 2085206801. The next prime is 2085206831. The reversal of 2085206805 is 5086025802.

It is not a de Polignac number, because 2085206805 - 2² = 2085206801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2085206805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2085206801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 890326 + ... + 892664.

It is an arithmetic number, because the mean of its divisors is an integer number (82225260).

Almost surely, 2^2085206805 is an apocalyptic number.

It is an amenable number.

2085206805 is a deficient number, since it is larger than the sum of its proper divisors (1861605675).

2085206805 is a wasteful number, since it uses less digits than its factorization.

2085206805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4162 (or 4159 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 2085206805 is about 45664.0647008126. The cubic root of 2085206805 is about 1277.5651150233.

The spelling of 2085206805 in words is "two billion, eighty-five million, two hundred six thousand, eight hundred five".