20050911 has 12 divisors (see below), whose sum is σ = 29330080. Its totient is φ = 13197600.

The previous prime is 20050879. The next prime is 20050913. The reversal of 20050911 is 11905002.

It is not a de Polignac number, because 20050911 - 2⁵ = 20050879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20050913) 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 11 ways as a sum of consecutive naturals, for example, 13390 + ... + 14811.

Almost surely, 2^20050911 is an apocalyptic number.

20050911 is a deficient number, since it is larger than the sum of its proper divisors (9279169).

20050911 is a wasteful number, since it uses less digits than its factorization.

20050911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28286 (or 28283 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 20050911 is about 4477.8243601106. The cubic root of 20050911 is about 271.6718893614.

Adding to 20050911 its reverse (11905002), we get a palindrome (31955913).

The spelling of 20050911 in words is "twenty million, fifty thousand, nine hundred eleven".