2168020894 has 24 divisors (see below), whose sum is σ = 3674549232. Its totient is φ = 957116160.

The previous prime is 2168020879. The next prime is 2168020901. The reversal of 2168020894 is 4980208612.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 131667 + ... + 147214.

It is an arithmetic number, because the mean of its divisors is an integer number (153106218).

Almost surely, 2^2168020894 is an apocalyptic number.

2168020894 is a deficient number, since it is larger than the sum of its proper divisors (1506528338).

2168020894 is a wasteful number, since it uses less digits than its factorization.

2168020894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278932 (or 278919 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 2168020894 is about 46562.0112752875. The cubic root of 2168020894 is about 1294.2588831521.

The spelling of 2168020894 in words is "two billion, one hundred sixty-eight million, twenty thousand, eight hundred ninety-four".