204021320434 has 32 divisors (see below), whose sum is σ = 322010640000. Its totient is φ = 96816956544.

The previous prime is 204021320429. The next prime is 204021320441. The reversal of 204021320434 is 434023120402.

It is a happy number.

204021320434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 204021320399 and 204021320408.

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 15 ways as a sum of consecutive naturals, for example, 851502 + ... + 1064470.

It is an arithmetic number, because the mean of its divisors is an integer number (10062832500).

Almost surely, 2^204021320434 is an apocalyptic number.

204021320434 is a deficient number, since it is larger than the sum of its proper divisors (117989319566).

204021320434 is a wasteful number, since it uses less digits than its factorization.

204021320434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213282.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 204021320434 its reverse (434023120402), we get a palindrome (638044440836).

The spelling of 204021320434 in words is "two hundred four billion, twenty-one million, three hundred twenty thousand, four hundred thirty-four".