2020123109 has 4 divisors (see below), whose sum is σ = 2021008704. Its totient is φ = 2019237516.

The previous prime is 2020123103. The next prime is 2020123117. The reversal of 2020123109 is 9013210202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2020123109 - 2²⁴ = 2003345893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020123103) 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, 439367 + ... + 443940.

It is an arithmetic number, because the mean of its divisors is an integer number (505252176).

Almost surely, 2^2020123109 is an apocalyptic number.

It is an amenable number.

2020123109 is a deficient number, since it is larger than the sum of its proper divisors (885595).

2020123109 is an equidigital number, since it uses as much as digits as its factorization.

2020123109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885594.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2020123109 is about 44945.7796572715. The cubic root of 2020123109 is about 1264.1325446934.

The spelling of 2020123109 in words is "two billion, twenty million, one hundred twenty-three thousand, one hundred nine".