204423644 has 6 divisors (see below), whose sum is σ = 357741384. Its totient is φ = 102211820.

The previous prime is 204423643. The next prime is 204423647. The reversal of 204423644 is 446324402.

204423644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204423643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552952 + ... + 25552959.

It is an arithmetic number, because the mean of its divisors is an integer number (59623564).

Almost surely, 2^204423644 is an apocalyptic number.

It is an amenable number.

204423644 is a deficient number, since it is larger than the sum of its proper divisors (153317740).

204423644 is a wasteful number, since it uses less digits than its factorization.

204423644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51105915 (or 51105913 counting only the distinct ones).

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

The square root of 204423644 is about 14297.6796718908. The cubic root of 204423644 is about 589.0837487554.

The spelling of 204423644 in words is "two hundred four million, four hundred twenty-three thousand, six hundred forty-four".