206810836 has 6 divisors (see below), whose sum is σ = 361918970. Its totient is φ = 103405416.

The previous prime is 206810833. The next prime is 206810837. The reversal of 206810836 is 638018602.

It can be written as a sum of positive squares in only one way, i.e., 194769936 + 12040900 = 13956^2 + 3470^2 .

It is a super-3 number, since 3×206810836³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206810833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25851351 + ... + 25851358.

Almost surely, 2^206810836 is an apocalyptic number.

It is an amenable number.

206810836 is a deficient number, since it is larger than the sum of its proper divisors (155108134).

206810836 is a wasteful number, since it uses less digits than its factorization.

206810836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51702713 (or 51702711 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 206810836 is about 14380.9191639478. The cubic root of 206810836 is about 591.3679224318.

The spelling of 206810836 in words is "two hundred six million, eight hundred ten thousand, eight hundred thirty-six".