204430005540 has 144 divisors (see below), whose sum is σ = 627419520000. Its totient is φ = 53875286784.

The previous prime is 204430005523. The next prime is 204430005547. The reversal of 204430005540 is 45500034402.

It is not an unprimeable number, because it can be changed into a prime (204430005547) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5318029 + ... + 5356331.

It is an arithmetic number, because the mean of its divisors is an integer number (4357080000).

Almost surely, 2^204430005540 is an apocalyptic number.

204430005540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204430005540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313709760000).

204430005540 is an abundant number, since it is smaller than the sum of its proper divisors (422989514460).

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

204430005540 is a wasteful number, since it uses less digits than its factorization.

204430005540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38666 (or 38661 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 204430005540 its reverse (45500034402), we get a palindrome (249930039942).

The spelling of 204430005540 in words is "two hundred four billion, four hundred thirty million, five thousand, five hundred forty".