20110091911 has 48 divisors (see below), whose sum is σ = 26840800224. Its totient is φ = 14882144256.

The previous prime is 20110091909. The next prime is 20110091957. The reversal of 20110091911 is 11919001102.

It is not a de Polignac number, because 20110091911 - 2¹ = 20110091909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110091011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1759431 + ... + 1770823.

It is an arithmetic number, because the mean of its divisors is an integer number (559183338).

Almost surely, 2^20110091911 is an apocalyptic number.

20110091911 is a deficient number, since it is larger than the sum of its proper divisors (6730708313).

20110091911 is a wasteful number, since it uses less digits than its factorization.

20110091911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11600 (or 11593 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 25.

The spelling of 20110091911 in words is "twenty billion, one hundred ten million, ninety-one thousand, nine hundred eleven".