204504422421 has 16 divisors (see below), whose sum is σ = 306414654336. Its totient is φ = 120377184576.

The previous prime is 204504422401. The next prime is 204504422429. The reversal of 204504422421 is 124224405402.

It is not a de Polignac number, because 204504422421 - 2¹³ = 204504414229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204504422429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113992650 + ... + 113994443.

It is an arithmetic number, because the mean of its divisors is an integer number (19150915896).

Almost surely, 2^204504422421 is an apocalyptic number.

It is an amenable number.

204504422421 is a deficient number, since it is larger than the sum of its proper divisors (101910231915).

204504422421 is a wasteful number, since it uses less digits than its factorization.

204504422421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227987132.

The product of its (nonzero) digits is 20480, while the sum is 30.

Adding to 204504422421 its reverse (124224405402), we get a palindrome (328728827823).

The spelling of 204504422421 in words is "two hundred four billion, five hundred four million, four hundred twenty-two thousand, four hundred twenty-one".