2082171890 has 8 divisors (see below), whose sum is σ = 3747909420. Its totient is φ = 832868752.

The previous prime is 2082171887. The next prime is 2082171901. The reversal of 2082171890 is 981712802.

It can be written as a sum of positive squares in 2 ways, for example, as 1736472241 + 345699649 = 41671^2 + 18593^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 104108585 + ... + 104108604.

Almost surely, 2^2082171890 is an apocalyptic number.

2082171890 is a deficient number, since it is larger than the sum of its proper divisors (1665737530).

2082171890 is a wasteful number, since it uses less digits than its factorization.

2082171890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208217196.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 2082171890 is about 45630.8217107691. The cubic root of 2082171890 is about 1276.9450032087.

The spelling of 2082171890 in words is "two billion, eighty-two million, one hundred seventy-one thousand, eight hundred ninety".