204005603 has 4 divisors (see below), whose sum is σ = 214742760. Its totient is φ = 193268448.

The previous prime is 204005587. The next prime is 204005609. The reversal of 204005603 is 306500402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 204005603 - 2⁴ = 204005587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204005609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5368550 + ... + 5368587.

It is an arithmetic number, because the mean of its divisors is an integer number (53685690).

Almost surely, 2^204005603 is an apocalyptic number.

204005603 is a deficient number, since it is larger than the sum of its proper divisors (10737157).

204005603 is a wasteful number, since it uses less digits than its factorization.

204005603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10737156.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 204005603 is about 14283.0529999717. The cubic root of 204005603 is about 588.6819211073.

The spelling of 204005603 in words is "two hundred four million, five thousand, six hundred three".