2189668205 has 16 divisors (see below), whose sum is σ = 2807186880. Its totient is φ = 1634764032.

The previous prime is 2189668193. The next prime is 2189668219. The reversal of 2189668205 is 5028669812.

2189668205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2189668205 - 2²⁸ = 1921232749 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2189668205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165644 + ... + 178373.

It is an arithmetic number, because the mean of its divisors is an integer number (175449180).

Almost surely, 2^2189668205 is an apocalyptic number.

It is an amenable number.

2189668205 is a deficient number, since it is larger than the sum of its proper divisors (617518675).

2189668205 is a wasteful number, since it uses less digits than its factorization.

2189668205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344108.

The product of its (nonzero) digits is 414720, while the sum is 47.

The square root of 2189668205 is about 46793.8906803014. The cubic root of 2189668205 is about 1298.5522749495.

The spelling of 2189668205 in words is "two billion, one hundred eighty-nine million, six hundred sixty-eight thousand, two hundred five".