204123544 has 16 divisors (see below), whose sum is σ = 385747200. Its totient is φ = 101257632.

The previous prime is 204123541. The next prime is 204123583. The reversal of 204123544 is 445321402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204123541) 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, 99439 + ... + 101470.

It is an arithmetic number, because the mean of its divisors is an integer number (24109200).

Almost surely, 2^204123544 is an apocalyptic number.

It is an amenable number.

204123544 is a deficient number, since it is larger than the sum of its proper divisors (181623656).

204123544 is a wasteful number, since it uses less digits than its factorization.

204123544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201042 (or 201038 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 204123544 is about 14287.1811075523. The cubic root of 204123544 is about 588.7953434153.

Adding to 204123544 its reverse (445321402), we get a palindrome (649444946).

The spelling of 204123544 in words is "two hundred four million, one hundred twenty-three thousand, five hundred forty-four".