204534380 has 12 divisors (see below), whose sum is σ = 429522240. Its totient is φ = 81813744.

The previous prime is 204534347. The next prime is 204534391. The reversal of 204534380 is 83435402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5113340 + ... + 5113379.

It is an arithmetic number, because the mean of its divisors is an integer number (35793520).

Almost surely, 2^204534380 is an apocalyptic number.

204534380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204534380 is an abundant number, since it is smaller than the sum of its proper divisors (224987860).

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

204534380 is a wasteful number, since it uses less digits than its factorization.

204534380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10226728 (or 10226726 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 204534380 is about 14301.5516640678. The cubic root of 204534380 is about 589.1900981669.

Adding to 204534380 its reverse (83435402), we get a palindrome (287969782).

The spelling of 204534380 in words is "two hundred four million, five hundred thirty-four thousand, three hundred eighty".