204011540 has 24 divisors (see below), whose sum is σ = 431700192. Its totient is φ = 80980640.

The previous prime is 204011539. The next prime is 204011573. The reversal of 204011540 is 45110402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36314 + ... + 41553.

It is an arithmetic number, because the mean of its divisors is an integer number (17987508).

Almost surely, 2^204011540 is an apocalyptic number.

204011540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204011540 is an abundant number, since it is smaller than the sum of its proper divisors (227688652).

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

204011540 is a wasteful number, since it uses less digits than its factorization.

204011540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78007 (or 78005 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 204011540 is about 14283.2608321769. The cubic root of 204011540 is about 588.6876316868.

Adding to 204011540 its reverse (45110402), we get a palindrome (249121942).

The spelling of 204011540 in words is "two hundred four million, eleven thousand, five hundred forty".