20000859 has 8 divisors (see below), whose sum is σ = 27528192. Its totient is φ = 12903720.

The previous prime is 20000843. The next prime is 20000861. The reversal of 20000859 is 95800002.

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

It is not a de Polignac number, because 20000859 - 2⁴ = 20000843 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20000839) by changing a digit.

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, 107439 + ... + 107624.

It is an arithmetic number, because the mean of its divisors is an integer number (3441024).

Almost surely, 2^20000859 is an apocalyptic number.

20000859 is a deficient number, since it is larger than the sum of its proper divisors (7527333).

20000859 is a wasteful number, since it uses less digits than its factorization.

20000859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215097.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 20000859 is about 4472.2319930880. The cubic root of 20000859 is about 271.4456477451.

The spelling of 20000859 in words is "twenty million, eight hundred fifty-nine", and thus it is an aban number.