20081859 has 16 divisors (see below), whose sum is σ = 31180032. Its totient is φ = 11258208.

The previous prime is 20081849. The next prime is 20081863. The reversal of 20081859 is 95818002.

It is a happy number.

It is not a de Polignac number, because 20081859 - 2⁵ = 20081827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20081849) 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, 7909 + ... + 10134.

It is an arithmetic number, because the mean of its divisors is an integer number (1948752).

Almost surely, 2^20081859 is an apocalyptic number.

20081859 is a deficient number, since it is larger than the sum of its proper divisors (11098173).

20081859 is a wasteful number, since it uses less digits than its factorization.

20081859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18106.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 20081859 is about 4481.2787237573. The cubic root of 20081859 is about 271.8115900739.

The spelling of 20081859 in words is "twenty million, eighty-one thousand, eight hundred fifty-nine".