204323412540 has 96 divisors (see below), whose sum is σ = 626214044736. Its totient is φ = 49470474240.

The previous prime is 204323412497. The next prime is 204323412563. The reversal of 204323412540 is 45214323402.

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 = 204323412498 and 204323412507.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2099577 + ... + 2194736.

It is an arithmetic number, because the mean of its divisors is an integer number (6523062966).

Almost surely, 2^204323412540 is an apocalyptic number.

204323412540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204323412540 is an abundant number, since it is smaller than the sum of its proper divisors (421890632196).

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

204323412540 is a wasteful number, since it uses less digits than its factorization.

204323412540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4294399 (or 4294397 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 204323412540 its reverse (45214323402), we get a palindrome (249537735942).

The spelling of 204323412540 in words is "two hundred four billion, three hundred twenty-three million, four hundred twelve thousand, five hundred forty".