2050839981 has 12 divisors (see below), whose sum is σ = 2963624508. Its totient is φ = 1366626624.

The previous prime is 2050839961. The next prime is 2050840021. The reversal of 2050839981 is 1899380502.

It is a happy number.

2050839981 is a `hidden beast` number, since 20 + 508 + 39 + 98 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1312902756 + 737937225 = 36234^2 + 27165^2 .

It is not a de Polignac number, because 2050839981 - 2⁵ = 2050839949 is a prime.

It is a super-2 number, since 2×2050839981² = 8411889255336160722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2050839961) 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 11 ways as a sum of consecutive naturals, for example, 27840 + ... + 69833.

It is an arithmetic number, because the mean of its divisors is an integer number (246968709).

Almost surely, 2^2050839981 is an apocalyptic number.

It is an amenable number.

2050839981 is a deficient number, since it is larger than the sum of its proper divisors (912784527).

2050839981 is a wasteful number, since it uses less digits than its factorization.

2050839981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100012 (or 100009 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 2050839981 is about 45286.2007790453. The cubic root of 2050839981 is about 1270.5075742024.

The spelling of 2050839981 in words is "two billion, fifty million, eight hundred thirty-nine thousand, nine hundred eighty-one".