204421020305 has 8 divisors (see below), whose sum is σ = 245311104744. Its totient is φ = 163532896000.

The previous prime is 204421020289. The next prime is 204421020337. The reversal of 204421020305 is 503020124402.

It is a happy number.

204421020305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14688470416 + 189732549889 = 121196^2 + 435583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204421020305 - 2⁴ = 204421020289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249896 + ... + 686505.

It is an arithmetic number, because the mean of its divisors is an integer number (30663888093).

Almost surely, 2^204421020305 is an apocalyptic number.

It is an amenable number.

204421020305 is a deficient number, since it is larger than the sum of its proper divisors (40890084439).

204421020305 is an equidigital number, since it uses as much as digits as its factorization.

204421020305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980067.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 204421020305 its reverse (503020124402), we get a palindrome (707441144707).

The spelling of 204421020305 in words is "two hundred four billion, four hundred twenty-one million, twenty thousand, three hundred five".