204242045 has 24 divisors (see below), whose sum is σ = 291750624. Its totient is φ = 136787616.

The previous prime is 204242023. The next prime is 204242083. The reversal of 204242045 is 540242402.

It is not a de Polignac number, because 204242045 - 2⁸ = 204241789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204242045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 842 + ... + 20228.

It is an arithmetic number, because the mean of its divisors is an integer number (12156276).

Almost surely, 2^204242045 is an apocalyptic number.

It is an amenable number.

204242045 is a deficient number, since it is larger than the sum of its proper divisors (87508579).

204242045 is a wasteful number, since it uses less digits than its factorization.

204242045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19449 (or 19442 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 204242045 is about 14291.3276150258. The cubic root of 204242045 is about 588.9092602752.

Adding to 204242045 its reverse (540242402), we get a palindrome (744484447).

The spelling of 204242045 in words is "two hundred four million, two hundred forty-two thousand, forty-five".