204323221366 has 32 divisors (see below), whose sum is σ = 341055626400. Its totient is φ = 91021708800.

The previous prime is 204323221343. The next prime is 204323221379. The reversal of 204323221366 is 663122323402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96910 + ... + 646558.

It is an arithmetic number, because the mean of its divisors is an integer number (10657988325).

Almost surely, 2^204323221366 is an apocalyptic number.

204323221366 is a deficient number, since it is larger than the sum of its proper divisors (136732405034).

204323221366 is a wasteful number, since it uses less digits than its factorization.

204323221366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550000.

The product of its (nonzero) digits is 62208, while the sum is 34.

Adding to 204323221366 its reverse (663122323402), we get a palindrome (867445544768).

The spelling of 204323221366 in words is "two hundred four billion, three hundred twenty-three million, two hundred twenty-one thousand, three hundred sixty-six".