204143124013 has 4 divisors (see below), whose sum is σ = 206602679808. Its totient is φ = 201683568220.

The previous prime is 204143123959. The next prime is 204143124019. The reversal of 204143124013 is 310421341402.

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.

It is a cyclic number.

It is not a de Polignac number, because 204143124013 - 2¹⁷ = 204142992941 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 (204143124019) 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, 1229777773 + ... + 1229777938.

It is an arithmetic number, because the mean of its divisors is an integer number (51650669952).

Almost surely, 2^204143124013 is an apocalyptic number.

It is an amenable number.

204143124013 is a deficient number, since it is larger than the sum of its proper divisors (2459555795).

204143124013 is an equidigital number, since it uses as much as digits as its factorization.

204143124013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459555794.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 204143124013 its reverse (310421341402), we get a palindrome (514564465415).

The spelling of 204143124013 in words is "two hundred four billion, one hundred forty-three million, one hundred twenty-four thousand, thirteen".