204023345 has 8 divisors (see below), whose sum is σ = 248841960. Its totient is φ = 160542720.

The previous prime is 204023329. The next prime is 204023353. The reversal of 204023345 is 543320402.

It can be written as a sum of positive squares in 4 ways, for example, as 3489424 + 200533921 = 1868^2 + 14161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204023345 - 2⁴ = 204023329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204023345.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 334160 + ... + 334769.

It is an arithmetic number, because the mean of its divisors is an integer number (31105245).

Almost surely, 2^204023345 is an apocalyptic number.

It is an amenable number.

204023345 is a deficient number, since it is larger than the sum of its proper divisors (44818615).

204023345 is an equidigital number, since it uses as much as digits as its factorization.

204023345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668995.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 204023345 is about 14283.6740721706. The cubic root of 204023345 is about 588.6989861482.

Adding to 204023345 its reverse (543320402), we get a palindrome (747343747).

The spelling of 204023345 in words is "two hundred four million, twenty-three thousand, three hundred forty-five".