243042020205 has 16 divisors (see below), whose sum is σ = 389225001984. Its totient is φ = 129503154240.

The previous prime is 243042020153. The next prime is 243042020209. The reversal of 243042020205 is 502020240342.

It is a happy number.

It is not a de Polignac number, because 243042020205 - 2¹² = 243042016109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243042020209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7436686 + ... + 7469295.

It is an arithmetic number, because the mean of its divisors is an integer number (24326562624).

Almost surely, 2^243042020205 is an apocalyptic number.

It is an amenable number.

243042020205 is a deficient number, since it is larger than the sum of its proper divisors (146182981779).

243042020205 is a wasteful number, since it uses less digits than its factorization.

243042020205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14907076.

The product of its (nonzero) digits is 3840, while the sum is 24.

Adding to 243042020205 its reverse (502020240342), we get a palindrome (745062260547).

The spelling of 243042020205 in words is "two hundred forty-three billion, forty-two million, twenty thousand, two hundred five".