204145233405 has 16 divisors (see below), whose sum is σ = 326780023680. Its totient is φ = 108828241088.

The previous prime is 204145233293. The next prime is 204145233407. The reversal of 204145233405 is 504332541402.

It is a cyclic number.

It is not a de Polignac number, because 204145233405 - 2²² = 204141039101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204145233407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3041745 + ... + 3108134.

It is an arithmetic number, because the mean of its divisors is an integer number (20423751480).

Almost surely, 2^204145233405 is an apocalyptic number.

It is an amenable number.

204145233405 is a deficient number, since it is larger than the sum of its proper divisors (122634790275).

204145233405 is a wasteful number, since it uses less digits than its factorization.

204145233405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6152100.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 204145233405 its reverse (504332541402), we get a palindrome (708477774807).

The spelling of 204145233405 in words is "two hundred four billion, one hundred forty-five million, two hundred thirty-three thousand, four hundred five".