20000849 has 16 divisors (see below), whose sum is σ = 22364160. Its totient is φ = 17735760.

The previous prime is 20000843. The next prime is 20000861. The reversal of 20000849 is 94800002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000843) 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, 143822 + ... + 143960.

It is an arithmetic number, because the mean of its divisors is an integer number (1397760).

Almost surely, 2^20000849 is an apocalyptic number.

It is an amenable number.

20000849 is a deficient number, since it is larger than the sum of its proper divisors (2363311).

20000849 is a wasteful number, since it uses less digits than its factorization.

20000849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20000849 is about 4472.2308750779. The cubic root of 20000849 is about 271.4456025061.

The spelling of 20000849 in words is "twenty million, eight hundred forty-nine", and thus it is an aban number.