206921168 has 20 divisors (see below), whose sum is σ = 411746340. Its totient is φ = 100664064.

The previous prime is 206921167. The next prime is 206921171. The reversal of 206921168 is 861129602.

206921168 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 99840064 + 107081104 = 9992^2 + 10348^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206921167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174173 + ... + 175356.

It is an arithmetic number, because the mean of its divisors is an integer number (20587317).

Almost surely, 2^206921168 is an apocalyptic number.

It is an amenable number.

206921168 is a deficient number, since it is larger than the sum of its proper divisors (204825172).

206921168 is a wasteful number, since it uses less digits than its factorization.

206921168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349574 (or 349568 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 206921168 is about 14384.7547076758. The cubic root of 206921168 is about 591.4730671579.

The spelling of 206921168 in words is "two hundred six million, nine hundred twenty-one thousand, one hundred sixty-eight".