204423440593 has 2 divisors, whose sum is σ = 204423440594. Its totient is φ = 204423440592.

The previous prime is 204423440587. The next prime is 204423440659. The reversal of 204423440593 is 395044324402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174843568449 + 29579872144 = 418143^2 + 171988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204423440593 is a prime.

It is not a weakly prime, because it can be changed into another prime (204423440503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102211720296 + 102211720297.

It is an arithmetic number, because the mean of its divisors is an integer number (102211720297).

Almost surely, 2^204423440593 is an apocalyptic number.

It is an amenable number.

204423440593 is a deficient number, since it is larger than the sum of its proper divisors (1).

204423440593 is an equidigital number, since it uses as much as digits as its factorization.

204423440593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 40.

Adding to 204423440593 its reverse (395044324402), we get a palindrome (599467764995).

The spelling of 204423440593 in words is "two hundred four billion, four hundred twenty-three million, four hundred forty thousand, five hundred ninety-three".