2019201909191 has 8 divisors (see below), whose sum is σ = 2020370669184. Its totient is φ = 2018033491320.

The previous prime is 2019201909161. The next prime is 2019201909199. The reversal of 2019201909191 is 1919091029102.

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

It is a cyclic number.

It is not a de Polignac number, because 2019201909191 - 2¹⁰ = 2019201908167 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 (2019201909199) 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 7 ways as a sum of consecutive naturals, for example, 12229376 + ... + 12393386.

It is an arithmetic number, because the mean of its divisors is an integer number (252546333648).

Almost surely, 2^{2019201909191} is an apocalyptic number.

2019201909191 is a deficient number, since it is larger than the sum of its proper divisors (1168759993).

2019201909191 is a wasteful number, since it uses less digits than its factorization.

2019201909191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171061.

The product of its (nonzero) digits is 26244, while the sum is 44.

The spelling of 2019201909191 in words is "two trillion, nineteen billion, two hundred one million, nine hundred nine thousand, one hundred ninety-one".