2000851891 has 2 divisors, whose sum is σ = 2000851892. Its totient is φ = 2000851890.

The previous prime is 2000851889. The next prime is 2000851939. The reversal of 2000851891 is 1981580002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2000851891 - 2¹ = 2000851889 is a prime.

Together with 2000851889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2000851841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000425945 + 1000425946.

It is an arithmetic number, because the mean of its divisors is an integer number (1000425946).

Almost surely, 2^2000851891 is an apocalyptic number.

2000851891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000851891 is an equidigital number, since it uses as much as digits as its factorization.

2000851891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 2000851891 is about 44730.8829669167. The cubic root of 2000851891 is about 1260.0999104029.

The spelling of 2000851891 in words is "two billion, eight hundred fifty-one thousand, eight hundred ninety-one".