2021881889 has 2 divisors, whose sum is σ = 2021881890. Its totient is φ = 2021881888.

The previous prime is 2021881837. The next prime is 2021881957. The reversal of 2021881889 is 9881881202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1771989025 + 249892864 = 42095^2 + 15808^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021881889 - 2²⁰ = 2020833313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2021881819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010940944 + 1010940945.

It is an arithmetic number, because the mean of its divisors is an integer number (1010940945).

Almost surely, 2^2021881889 is an apocalyptic number.

It is an amenable number.

2021881889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021881889 is an equidigital number, since it uses as much as digits as its factorization.

2021881889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 47.

The square root of 2021881889 is about 44965.3409750221. The cubic root of 2021881889 is about 1264.4993022285.

The spelling of 2021881889 in words is "two billion, twenty-one million, eight hundred eighty-one thousand, eight hundred eighty-nine".