20091101911 has 4 divisors (see below), whose sum is σ = 20094166024. Its totient is φ = 20088037800.

The previous prime is 20091101897. The next prime is 20091101941. The reversal of 20091101911 is 11910119002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20091101911 - 2⁵ = 20091101879 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 (20091101941) 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 3 ways as a sum of consecutive naturals, for example, 1522200 + ... + 1535341.

It is an arithmetic number, because the mean of its divisors is an integer number (5023541506).

Almost surely, 2^20091101911 is an apocalyptic number.

20091101911 is a deficient number, since it is larger than the sum of its proper divisors (3064113).

20091101911 is an equidigital number, since it uses as much as digits as its factorization.

20091101911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064112.

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

The spelling of 20091101911 in words is "twenty billion, ninety-one million, one hundred one thousand, nine hundred eleven".