206818 has 4 divisors (see below), whose sum is σ = 310230. Its totient is φ = 103408.

The previous prime is 206813. The next prime is 206819. The reversal of 206818 is 818602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 178929 + 27889 = 423^2 + 167^2 .

It is a junction number, because it is equal to n+sod(n) for n = 206792 and 206801.

It is not an unprimeable number, because it can be changed into a prime (206813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51703 + ... + 51706.

2²⁰⁶⁸¹⁸ is an apocalyptic number.

206818 is a deficient number, since it is larger than the sum of its proper divisors (103412).

206818 is a wasteful number, since it uses less digits than its factorization.

206818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103411.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 206818 is about 454.7724705828. The cubic root of 206818 is about 59.1374750750.

It can be divided in two parts, 206 and 818, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 206818 in words is "two hundred six thousand, eight hundred eighteen".