204542540 has 12 divisors (see below), whose sum is σ = 429539376. Its totient is φ = 81817008.

The previous prime is 204542431. The next prime is 204542573. The reversal of 204542540 is 45245402.

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, 5113544 + ... + 5113583.

It is an arithmetic number, because the mean of its divisors is an integer number (35794948).

Almost surely, 2^204542540 is an apocalyptic number.

204542540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204542540 is an abundant number, since it is smaller than the sum of its proper divisors (224996836).

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

204542540 is a wasteful number, since it uses less digits than its factorization.

204542540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10227136 (or 10227134 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 204542540 is about 14301.8369449522. The cubic root of 204542540 is about 589.1979334059.

Adding to 204542540 its reverse (45245402), we get a palindrome (249787942).

The spelling of 204542540 in words is "two hundred four million, five hundred forty-two thousand, five hundred forty".