204436042523 has 2 divisors, whose sum is σ = 204436042524. Its totient is φ = 204436042522.

The previous prime is 204436042493. The next prime is 204436042549. The reversal of 204436042523 is 325240634402.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204436042523 - 2²⁰ = 204434993947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (204436045523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102218021261 + 102218021262.

It is an arithmetic number, because the mean of its divisors is an integer number (102218021262).

Almost surely, 2^204436042523 is an apocalyptic number.

204436042523 is a deficient number, since it is larger than the sum of its proper divisors (1).

204436042523 is an equidigital number, since it uses as much as digits as its factorization.

204436042523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 35.

Adding to 204436042523 its reverse (325240634402), we get a palindrome (529676676925).

The spelling of 204436042523 in words is "two hundred four billion, four hundred thirty-six million, forty-two thousand, five hundred twenty-three".