204042002440 has 32 divisors (see below), whose sum is σ = 483257376000. Its totient is φ = 77321179584.

The previous prime is 204042002369. The next prime is 204042002443. The reversal of 204042002440 is 44200240402.

It is not an unprimeable number, because it can be changed into a prime (204042002443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134237400 + ... + 134238919.

It is an arithmetic number, because the mean of its divisors is an integer number (15101793000).

Almost surely, 2^204042002440 is an apocalyptic number.

204042002440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204042002440 is an abundant number, since it is smaller than the sum of its proper divisors (279215373560).

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

204042002440 is a wasteful number, since it uses less digits than its factorization.

204042002440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268476349 (or 268476345 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 204042002440 its reverse (44200240402), we get a palindrome (248242242842).

The spelling of 204042002440 in words is "two hundred four billion, forty-two million, two thousand, four hundred forty".