204043434240420 has 144 divisors (see below), whose sum is σ = 647649309844992. Its totient is φ = 51935049884160.

The previous prime is 204043434240413. The next prime is 204043434240439. The reversal of 204043434240420 is 24042434340402.

204043434240420 is a `hidden beast` number, since 2 + 0 + 404 + 3 + 4 + 3 + 4 + 240 + 4 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 250051042 + ... + 250865721.

Almost surely, 2^{204043434240420} is an apocalyptic number.

204043434240420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204043434240420 is an abundant number, since it is smaller than the sum of its proper divisors (443605875604572).

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

204043434240420 is a wasteful number, since it uses less digits than its factorization.

204043434240420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500916882 (or 500916877 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 36.

Adding to 204043434240420 its reverse (24042434340402), we get a palindrome (228085868580822).

The spelling of 204043434240420 in words is "two hundred four trillion, forty-three billion, four hundred thirty-four million, two hundred forty thousand, four hundred twenty".