206820036 has 36 divisors (see below), whose sum is σ = 523468764. Its totient is φ = 68851200.

The previous prime is 206820013. The next prime is 206820043. The reversal of 206820036 is 630028602.

It can be written as a sum of positive squares in 2 ways, for example, as 119771136 + 87048900 = 10944^2 + 9330^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 206819991 and 206820009.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 28456 + ... + 34976.

It is an arithmetic number, because the mean of its divisors is an integer number (14540799).

Almost surely, 2^206820036 is an apocalyptic number.

It is an amenable number.

206820036 is an abundant number, since it is smaller than the sum of its proper divisors (316648728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206820036 is a wasteful number, since it uses less digits than its factorization.

206820036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7412 (or 7407 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 206820036 is about 14381.2390286790. The cubic root of 206820036 is about 591.3766913214.

Adding to 206820036 its reverse (630028602), we get a palindrome (836848638).

The spelling of 206820036 in words is "two hundred six million, eight hundred twenty thousand, thirty-six".