204642443 has 2 divisors, whose sum is σ = 204642444. Its totient is φ = 204642442.

The previous prime is 204642437. The next prime is 204642457. The reversal of 204642443 is 344246402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204642443 - 2²⁰ = 203593867 is a prime.

It is not a weakly prime, because it can be changed into another prime (204642343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102321221 + 102321222.

It is an arithmetic number, because the mean of its divisors is an integer number (102321222).

Almost surely, 2^204642443 is an apocalyptic number.

204642443 is a deficient number, since it is larger than the sum of its proper divisors (1).

204642443 is an equidigital number, since it uses as much as digits as its factorization.

204642443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

The square root of 204642443 is about 14305.3291818119. The cubic root of 204642443 is about 589.2938434637.

Adding to 204642443 its reverse (344246402), we get a palindrome (548888845).

The spelling of 204642443 in words is "two hundred four million, six hundred forty-two thousand, four hundred forty-three".