20050891 has 8 divisors (see below), whose sum is σ = 23192064. Its totient is φ = 16978920.

The previous prime is 20050879. The next prime is 20050913. The reversal of 20050891 is 19805002.

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

It is not a de Polignac number, because 20050891 - 2⁵ = 20050859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20050291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16675 + ... + 17836.

It is an arithmetic number, because the mean of its divisors is an integer number (2899008).

Almost surely, 2^20050891 is an apocalyptic number.

20050891 is a deficient number, since it is larger than the sum of its proper divisors (3141173).

20050891 is an equidigital number, since it uses as much as digits as its factorization.

20050891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34601.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 20050891 is about 4477.8221268827. The cubic root of 20050891 is about 271.6717990340.

Adding to 20050891 its reverse (19805002), we get a palindrome (39855893).

The spelling of 20050891 in words is "twenty million, fifty thousand, eight hundred ninety-one".