204343303440 has 80 divisors (see below), whose sum is σ = 670726856448. Its totient is φ = 51286161408.

The previous prime is 204343303363. The next prime is 204343303447. The reversal of 204343303440 is 44303343402.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 204343303398 and 204343303407.

It is not an unprimeable number, because it can be changed into a prime (204343303447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25037992 + ... + 25046151.

Almost surely, 2^204343303440 is an apocalyptic number.

204343303440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204343303440 is an abundant number, since it is smaller than the sum of its proper divisors (466383553008).

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

204343303440 is a wasteful number, since it uses less digits than its factorization.

204343303440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50084176 (or 50084170 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 30.

Adding to 204343303440 its reverse (44303343402), we get a palindrome (248646646842).

The spelling of 204343303440 in words is "two hundred four billion, three hundred forty-three million, three hundred three thousand, four hundred forty".