204817308469 has 4 divisors (see below), whose sum is σ = 209812852620. Its totient is φ = 199821764320.

The previous prime is 204817308467. The next prime is 204817308511. The reversal of 204817308469 is 964803718402.

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 15113505969 + 189703802500 = 122937^2 + 435550^2 .

It is a cyclic number.

It is not a de Polignac number, because 204817308469 - 2¹ = 204817308467 is a prime.

It is a super-2 number, since 2×204817308469² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204817308467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2497772014 + ... + 2497772095.

It is an arithmetic number, because the mean of its divisors is an integer number (52453213155).

Almost surely, 2^204817308469 is an apocalyptic number.

It is an amenable number.

204817308469 is a deficient number, since it is larger than the sum of its proper divisors (4995544151).

204817308469 is an equidigital number, since it uses as much as digits as its factorization.

204817308469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4995544150.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 204817308469 in words is "two hundred four billion, eight hundred seventeen million, three hundred eight thousand, four hundred sixty-nine".