204123033005 has 18 divisors (see below), whose sum is σ = 247617781866. Its totient is φ = 161537349888.

The previous prime is 204123032959. The next prime is 204123033007. The reversal of 204123033005 is 500330321402.

It can be written as a sum of positive squares in 3 ways, for example, as 14596022596 + 189527010409 = 120814^2 + 435347^2 .

It is not a de Polignac number, because 204123033005 - 2³⁴ = 186943163821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204123033007) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 97993694 + ... + 97995776.

It is an arithmetic number, because the mean of its divisors is an integer number (13756543437).

Almost surely, 2^204123033005 is an apocalyptic number.

It is an amenable number.

204123033005 is a deficient number, since it is larger than the sum of its proper divisors (43494748861).

204123033005 is an frugal number, since it uses more digits than its factorization.

204123033005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365 (or 2185 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

Adding to 204123033005 its reverse (500330321402), we get a palindrome (704453354407).

The spelling of 204123033005 in words is "two hundred four billion, one hundred twenty-three million, thirty-three thousand, five".