2081881389 has 8 divisors (see below), whose sum is σ = 3172390720. Its totient is φ = 1189646496.

The previous prime is 2081881369. The next prime is 2081881397. The reversal of 2081881389 is 9831881802.

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

It is not a de Polignac number, because 2081881389 - 2²⁰ = 2080832813 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 (2081881339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49568584 + ... + 49568625.

It is an arithmetic number, because the mean of its divisors is an integer number (396548840).

Almost surely, 2^2081881389 is an apocalyptic number.

It is an amenable number.

2081881389 is a deficient number, since it is larger than the sum of its proper divisors (1090509331).

2081881389 is an equidigital number, since it uses as much as digits as its factorization.

2081881389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99137219.

The product of its (nonzero) digits is 221184, while the sum is 48.

The square root of 2081881389 is about 45627.6384333005. The cubic root of 2081881389 is about 1276.8856147316.

The spelling of 2081881389 in words is "two billion, eighty-one million, eight hundred eighty-one thousand, three hundred eighty-nine".