204940330313 has 4 divisors (see below), whose sum is σ = 204946932420. Its totient is φ = 204933728208.

The previous prime is 204940330303. The next prime is 204940330409. The reversal of 204940330313 is 313033049402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313033049402 = 2 ⋅156516524701.

It can be written as a sum of positive squares in 2 ways, for example, as 78878407609 + 126061922704 = 280853^2 + 355052^2 .

It is a cyclic number.

It is not a de Polignac number, because 204940330313 - 2⁴ = 204940330297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204940330313.

It is not an unprimeable number, because it can be changed into a prime (204940330303) 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, 3254270 + ... + 3316647.

It is an arithmetic number, because the mean of its divisors is an integer number (51236733105).

Almost surely, 2^204940330313 is an apocalyptic number.

It is an amenable number.

204940330313 is a deficient number, since it is larger than the sum of its proper divisors (6602107).

204940330313 is an equidigital number, since it uses as much as digits as its factorization.

204940330313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6602106.

The product of its (nonzero) digits is 23328, while the sum is 32.

Adding to 204940330313 its reverse (313033049402), we get a palindrome (517973379715).

The spelling of 204940330313 in words is "two hundred four billion, nine hundred forty million, three hundred thirty thousand, three hundred thirteen".