206636 has 6 divisors (see below), whose sum is σ = 361620. Its totient is φ = 103316.

The previous prime is 206627. The next prime is 206639. The reversal of 206636 is 636602.

206636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 206636.

It is not an unprimeable number, because it can be changed into a prime (206639) by changing a digit.

206636 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25826 + ... + 25833.

It is an arithmetic number, because the mean of its divisors is an integer number (60270).

2²⁰⁶⁶³⁶ is an apocalyptic number.

It is an amenable number.

206636 is a deficient number, since it is larger than the sum of its proper divisors (154984).

206636 is a wasteful number, since it uses less digits than its factorization.

206636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51663 (or 51661 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 206636 is about 454.5723264784. The cubic root of 206636 is about 59.1201229762.

The spelling of 206636 in words is "two hundred six thousand, six hundred thirty-six".