204042440023 has 4 divisors (see below), whose sum is σ = 204068867848. Its totient is φ = 204016012200.

The previous prime is 204042440009. The next prime is 204042440123. The reversal of 204042440023 is 320044240402.

204042440023 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 a de Polignac number, because none of the positive numbers 2^k-204042440023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204042440023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204042440123) 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, 13202328 + ... + 13217773.

It is an arithmetic number, because the mean of its divisors is an integer number (51017216962).

Almost surely, 2^204042440023 is an apocalyptic number.

204042440023 is a deficient number, since it is larger than the sum of its proper divisors (26427825).

204042440023 is an equidigital number, since it uses as much as digits as its factorization.

204042440023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26427824.

The product of its (nonzero) digits is 6144, while the sum is 25.

Adding to 204042440023 its reverse (320044240402), we get a palindrome (524086680425).

The spelling of 204042440023 in words is "two hundred four billion, forty-two million, four hundred forty thousand, twenty-three".