204363421440 has 288 divisors, whose sum is σ = 664933280256. Its totient is φ = 53480570880.

The previous prime is 204363421439. The next prime is 204363421453. The reversal of 204363421440 is 44124363402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75381685 + ... + 75384395.

It is an arithmetic number, because the mean of its divisors is an integer number (2308796112).

Almost surely, 2^204363421440 is an apocalyptic number.

204363421440 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 204363421440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332466640128).

204363421440 is an abundant number, since it is smaller than the sum of its proper divisors (460569858816).

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

204363421440 is a wasteful number, since it uses less digits than its factorization.

204363421440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095 (or 3081 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 204363421440 its reverse (44124363402), we get a palindrome (248487784842).

The spelling of 204363421440 in words is "two hundred four billion, three hundred sixty-three million, four hundred twenty-one thousand, four hundred forty".