206218089 has 32 divisors (see below), whose sum is σ = 380897280. Its totient is φ = 107125200.

The previous prime is 206218079. The next prime is 206218091. The reversal of 206218089 is 980812602.

206218089 is a `hidden beast` number, since 20 + 621 + 8 + 0 + 8 + 9 = 666.

It is not a de Polignac number, because 206218089 - 2⁷ = 206217961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206218079) 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 in 31 ways as a sum of consecutive naturals, for example, 47517 + ... + 51674.

It is an arithmetic number, because the mean of its divisors is an integer number (11903040).

Almost surely, 2^206218089 is an apocalyptic number.

It is an amenable number.

206218089 is a deficient number, since it is larger than the sum of its proper divisors (174679191).

206218089 is a wasteful number, since it uses less digits than its factorization.

206218089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99218 (or 99212 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 206218089 is about 14360.2955749525. The cubic root of 206218089 is about 590.8024024413.

The spelling of 206218089 in words is "two hundred six million, two hundred eighteen thousand, eighty-nine".