204321320 has 32 divisors (see below), whose sum is σ = 525398400. Its totient is φ = 70052928.

The previous prime is 204321319. The next prime is 204321323. The reversal of 204321320 is 23123402.

It is not an unprimeable number, because it can be changed into a prime (204321323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364580 + ... + 365139.

It is an arithmetic number, because the mean of its divisors is an integer number (16418700).

Almost surely, 2^204321320 is an apocalyptic number.

204321320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204321320 is an abundant number, since it is smaller than the sum of its proper divisors (321077080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204321320 is a wasteful number, since it uses less digits than its factorization.

204321320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729737 (or 729733 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 204321320 is about 14294.1008811327. The cubic root of 204321320 is about 588.9854439729.

Adding to 204321320 its reverse (23123402), we get a palindrome (227444722).

The spelling of 204321320 in words is "two hundred four million, three hundred twenty-one thousand, three hundred twenty".