206042020 has 24 divisors (see below), whose sum is σ = 436976568. Its totient is φ = 81600000.

The previous prime is 206042017. The next prime is 206042021. The reversal of 206042020 is 20240602.

It can be written as a sum of positive squares in 4 ways, for example, as 21734244 + 184307776 = 4662^2 + 13576^2 .

It is a junction number, because it is equal to n+sod(n) for n = 206041985 and 206042003.

It is not an unprimeable number, because it can be changed into a prime (206042021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48981 + ... + 53020.

It is an arithmetic number, because the mean of its divisors is an integer number (18207357).

Almost surely, 2^206042020 is an apocalyptic number.

206042020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206042020 is an abundant number, since it is smaller than the sum of its proper divisors (230934548).

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

206042020 is a wasteful number, since it uses less digits than its factorization.

206042020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102111 (or 102109 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 206042020 is about 14354.1638558294. The cubic root of 206042020 is about 590.6342122057.

Adding to 206042020 its reverse (20240602), we get a palindrome (226282622).

The spelling of 206042020 in words is "two hundred six million, forty-two thousand, twenty".