204132410509 has 4 divisors (see below), whose sum is σ = 204135400800. Its totient is φ = 204129420220.

The previous prime is 204132410507. The next prime is 204132410557. The reversal of 204132410509 is 905014231402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 905014231402 = 2 ⋅452507115701.

It is a cyclic number.

It is not a de Polignac number, because 204132410509 - 2¹ = 204132410507 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 (204132410507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390297 + ... + 1530094.

It is an arithmetic number, because the mean of its divisors is an integer number (51033850200).

Almost surely, 2^204132410509 is an apocalyptic number.

It is an amenable number.

204132410509 is a deficient number, since it is larger than the sum of its proper divisors (2990291).

204132410509 is an equidigital number, since it uses as much as digits as its factorization.

204132410509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990290.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 204132410509 in words is "two hundred four billion, one hundred thirty-two million, four hundred ten thousand, five hundred nine".