2020109391 has 6 divisors (see below), whose sum is σ = 2917935800. Its totient is φ = 1346739588.

The previous prime is 2020109309. The next prime is 2020109407. The reversal of 2020109391 is 1939010202.

2020109391 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2020109391 - 2⁷ = 2020109263 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 (2020109291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112228291 + ... + 112228308.

Almost surely, 2^2020109391 is an apocalyptic number.

2020109391 is a deficient number, since it is larger than the sum of its proper divisors (897826409).

2020109391 is a wasteful number, since it uses less digits than its factorization.

2020109391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224456605 (or 224456602 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 2020109391 is about 44945.6270509156. The cubic root of 2020109391 is about 1264.1296832491.

Adding to 2020109391 its reverse (1939010202), we get a palindrome (3959119593).

The spelling of 2020109391 in words is "two billion, twenty million, one hundred nine thousand, three hundred ninety-one".