206405600203 has 4 divisors (see below), whose sum is σ = 225169745688. Its totient is φ = 187641454720.

The previous prime is 206405600153. The next prime is 206405600209. The reversal of 206405600203 is 302006504602.

It is a happy number.

206405600203 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 206405600203 - 2⁹ = 206405599691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206405600209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9382072726 + ... + 9382072747.

It is an arithmetic number, because the mean of its divisors is an integer number (56292436422).

Almost surely, 2^206405600203 is an apocalyptic number.

206405600203 is a deficient number, since it is larger than the sum of its proper divisors (18764145485).

206405600203 is a wasteful number, since it uses less digits than its factorization.

206405600203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18764145484.

The product of its (nonzero) digits is 8640, while the sum is 28.

It can be divided in two parts, 206405 and 600203, that added together give a palindrome (806608).

The spelling of 206405600203 in words is "two hundred six billion, four hundred five million, six hundred thousand, two hundred three".