204850782840 has 128 divisors (see below), whose sum is σ = 672249093120. Its totient is φ = 49525363200.

The previous prime is 204850782781. The next prime is 204850782841. The reversal of 204850782840 is 48287058402.

It is a self number, because there is not a number n which added to its sum of digits gives 204850782840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204850782841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 273010 + ... + 695870.

It is an arithmetic number, because the mean of its divisors is an integer number (5251946040).

Almost surely, 2^204850782840 is an apocalyptic number.

204850782840 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 204850782840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336124546560).

204850782840 is an abundant number, since it is smaller than the sum of its proper divisors (467398310280).

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

204850782840 is a wasteful number, since it uses less digits than its factorization.

204850782840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423253 (or 423249 counting only the distinct ones).

The product of its (nonzero) digits is 1146880, while the sum is 48.

The spelling of 204850782840 in words is "two hundred four billion, eight hundred fifty million, seven hundred eighty-two thousand, eight hundred forty".