204042354013 has 4 divisors (see below), whose sum is σ = 204127622748. Its totient is φ = 203957085280.

The previous prime is 204042354011. The next prime is 204042354041. The reversal of 204042354013 is 310453240402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110781134244 + 93261219769 = 332838^2 + 305387^2 .

It is a cyclic number.

It is not a de Polignac number, because 204042354013 - 2¹ = 204042354011 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 (204042354011) 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, 42630778 + ... + 42635563.

It is an arithmetic number, because the mean of its divisors is an integer number (51031905687).

Almost surely, 2^204042354013 is an apocalyptic number.

It is an amenable number.

204042354013 is a deficient number, since it is larger than the sum of its proper divisors (85268735).

204042354013 is an equidigital number, since it uses as much as digits as its factorization.

204042354013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85268734.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 204042354013 its reverse (310453240402), we get a palindrome (514495594415).

The spelling of 204042354013 in words is "two hundred four billion, forty-two million, three hundred fifty-four thousand, thirteen".