204021312 has 56 divisors (see below), whose sum is σ = 588885792. Its totient is φ = 61824000.

The previous prime is 204021263. The next prime is 204021317. The reversal of 204021312 is 213120402.

It is a junction number, because it is equal to n+sod(n) for n = 204021291 and 204021300.

It is not an unprimeable number, because it can be changed into a prime (204021317) 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, 46189 + ... + 50412.

Almost surely, 2^204021312 is an apocalyptic number.

204021312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

204021312 is an abundant number, since it is smaller than the sum of its proper divisors (384864480).

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

204021312 is a wasteful number, since it uses less digits than its factorization.

204021312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96627 (or 96617 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 204021312 is about 14283.6029068299. The cubic root of 204021312 is about 588.6970307690.

Adding to 204021312 its reverse (213120402), we get a palindrome (417141714).

The spelling of 204021312 in words is "two hundred four million, twenty-one thousand, three hundred twelve".