204542403 has 16 divisors (see below), whose sum is σ = 294389760. Its totient is φ = 125577504.

The previous prime is 204542389. The next prime is 204542411. The reversal of 204542403 is 304245402.

It is not a de Polignac number, because 204542403 - 2⁹ = 204541891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204542003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11358 + ... + 23196.

It is an arithmetic number, because the mean of its divisors is an integer number (18399360).

Almost surely, 2^204542403 is an apocalyptic number.

204542403 is a deficient number, since it is larger than the sum of its proper divisors (89847357).

204542403 is a wasteful number, since it uses less digits than its factorization.

204542403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12298.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 204542403 is about 14301.8321553569. The cubic root of 204542403 is about 589.1978018601.

Adding to 204542403 its reverse (304245402), we get a palindrome (508787805).

The spelling of 204542403 in words is "two hundred four million, five hundred forty-two thousand, four hundred three".