204504345 has 40 divisors (see below), whose sum is σ = 375150336. Its totient is φ = 106523424.

The previous prime is 204504341. The next prime is 204504367. The reversal of 204504345 is 543405402.

It is not a de Polignac number, because 204504345 - 2² = 204504341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (204504341) 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 39 ways as a sum of consecutive naturals, for example, 11544 + ... + 23286.

Almost surely, 2^204504345 is an apocalyptic number.

It is an amenable number.

204504345 is a deficient number, since it is larger than the sum of its proper divisors (170645991).

204504345 is a wasteful number, since it uses less digits than its factorization.

204504345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11803 (or 11794 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 204504345 is about 14300.5015646305. The cubic root of 204504345 is about 589.1612567388.

Adding to 204504345 its reverse (543405402), we get a palindrome (747909747).

The spelling of 204504345 in words is "two hundred four million, five hundred four thousand, three hundred forty-five".