20191092911 has 8 divisors (see below), whose sum is σ = 22244733648. Its totient is φ = 18173800000.

The previous prime is 20191092893. The next prime is 20191092913. The reversal of 20191092911 is 11929019102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20191092911 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 (20191092913) 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, 9085790 + ... + 9088011.

It is an arithmetic number, because the mean of its divisors is an integer number (2780591706).

Almost surely, 2^20191092911 is an apocalyptic number.

20191092911 is a deficient number, since it is larger than the sum of its proper divisors (2053640737).

20191092911 is a wasteful number, since it uses less digits than its factorization.

20191092911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18173913.

The product of its (nonzero) digits is 2916, while the sum is 35.

The spelling of 20191092911 in words is "twenty billion, one hundred ninety-one million, ninety-two thousand, nine hundred eleven".