206820086 has 32 divisors (see below), whose sum is σ = 345316608. Its totient is φ = 92118240.

The previous prime is 206820077. The next prime is 206820101. The reversal of 206820086 is 680028602.

It is a happy number.

It is a Smith number, since the sum of its digits (32) 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 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, 242036 + ... + 242888.

It is an arithmetic number, because the mean of its divisors is an integer number (10791144).

Almost surely, 2^206820086 is an apocalyptic number.

206820086 is a deficient number, since it is larger than the sum of its proper divisors (138496522).

206820086 is a wasteful number, since it uses less digits than its factorization.

206820086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 206820086 is about 14381.2407670548. The cubic root of 206820086 is about 591.3767389777.

Adding to 206820086 its reverse (680028602), we get a palindrome (886848688).

The spelling of 206820086 in words is "two hundred six million, eight hundred twenty thousand, eighty-six".