2020919191 has 4 divisors (see below), whose sum is σ = 2051082232. Its totient is φ = 1990756152.

The previous prime is 2020919189. The next prime is 2020919213. The reversal of 2020919191 is 1919190202.

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 2020919191 - 2¹ = 2020919189 is a prime.

It is a super-2 number, since 2×2020919191² = 8168228753104188962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020919141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15081420 + ... + 15081553.

It is an arithmetic number, because the mean of its divisors is an integer number (512770558).

Almost surely, 2^2020919191 is an apocalyptic number.

2020919191 is a deficient number, since it is larger than the sum of its proper divisors (30163041).

2020919191 is an equidigital number, since it uses as much as digits as its factorization.

2020919191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30163040.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 2020919191 is about 44954.6348111071. The cubic root of 2020919191 is about 1264.2985776439.

The spelling of 2020919191 in words is "two billion, twenty million, nine hundred nineteen thousand, one hundred ninety-one".