204404320023 has 4 divisors (see below), whose sum is σ = 272539093368. Its totient is φ = 136269546680.

The previous prime is 204404320009. The next prime is 204404320069. The reversal of 204404320023 is 320023404402.

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 204404320023 - 2¹⁶ = 204404254487 is a prime.

It is a super-2 number, since 2×204404320023² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204404319975 and 204404320002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204404325023) 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 3 ways as a sum of consecutive naturals, for example, 34067386668 + ... + 34067386673.

It is an arithmetic number, because the mean of its divisors is an integer number (68134773342).

Almost surely, 2^204404320023 is an apocalyptic number.

204404320023 is a deficient number, since it is larger than the sum of its proper divisors (68134773345).

204404320023 is an equidigital number, since it uses as much as digits as its factorization.

204404320023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68134773344.

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 204404320023 its reverse (320023404402), we get a palindrome (524427724425).

The spelling of 204404320023 in words is "two hundred four billion, four hundred four million, three hundred twenty thousand, twenty-three".