204534503540 has 12 divisors (see below), whose sum is σ = 429522457476. Its totient is φ = 81813801408.

The previous prime is 204534503527. The next prime is 204534503627. The reversal of 204534503540 is 45305435402.

It can be written as a sum of positive squares in 2 ways, for example, as 86696091364 + 117838412176 = 294442^2 + 343276^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204534503540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5113362569 + ... + 5113362608.

It is an arithmetic number, because the mean of its divisors is an integer number (35793538123).

Almost surely, 2^204534503540 is an apocalyptic number.

204534503540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204534503540 is an abundant number, since it is smaller than the sum of its proper divisors (224987953936).

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

204534503540 is a wasteful number, since it uses less digits than its factorization.

204534503540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226725186 (or 10226725184 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 35.

Adding to 204534503540 its reverse (45305435402), we get a palindrome (249839938942).

The spelling of 204534503540 in words is "two hundred four billion, five hundred thirty-four million, five hundred three thousand, five hundred forty".