204040403 has 4 divisors (see below), whose sum is σ = 233189040. Its totient is φ = 174891768.

The previous prime is 204040399. The next prime is 204040423. The reversal of 204040403 is 304040402.

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 204040403 - 2² = 204040399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204040423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14574308 + ... + 14574321.

It is an arithmetic number, because the mean of its divisors is an integer number (58297260).

Almost surely, 2^204040403 is an apocalyptic number.

204040403 is a deficient number, since it is larger than the sum of its proper divisors (29148637).

204040403 is an equidigital number, since it uses as much as digits as its factorization.

204040403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29148636.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 204040403 is about 14284.2711749672. The cubic root of 204040403 is about 588.7153923548.

Adding to 204040403 its reverse (304040402), we get a palindrome (508080805).

Subtracting 204040403 from its reverse (304040402), we obtain a palindrome (99999999).

The spelling of 204040403 in words is "two hundred four million, forty thousand, four hundred three".