204123560 has 32 divisors (see below), whose sum is σ = 464819040. Its totient is φ = 80664384.

The previous prime is 204123541. The next prime is 204123583. The reversal of 204123560 is 65321402.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27422 + ... + 34061.

It is an arithmetic number, because the mean of its divisors is an integer number (14525595).

Almost surely, 2^204123560 is an apocalyptic number.

204123560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204123560 is an abundant number, since it is smaller than the sum of its proper divisors (260695480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204123560 is a wasteful number, since it uses less digits than its factorization.

204123560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61577 (or 61573 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 204123560 is about 14287.1816674948. The cubic root of 204123560 is about 588.7953587994.

Adding to 204123560 its reverse (65321402), we get a palindrome (269444962).

The spelling of 204123560 in words is "two hundred four million, one hundred twenty-three thousand, five hundred sixty".