204894385794 has 96 divisors (see below), whose sum is σ = 512809315200. Its totient is φ = 57915360000.

The previous prime is 204894385783. The next prime is 204894385837. The reversal of 204894385794 is 497583498402.

204894385794 is a `hidden beast` number, since 2 + 0 + 489 + 4 + 3 + 85 + 79 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 4690534 + ... + 4734014.

It is an arithmetic number, because the mean of its divisors is an integer number (5341763700).

Almost surely, 2^204894385794 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204894385794, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256404657600).

204894385794 is an abundant number, since it is smaller than the sum of its proper divisors (307914929406).

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

204894385794 is a wasteful number, since it uses less digits than its factorization.

204894385794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43896 (or 43893 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 63.

The spelling of 204894385794 in words is "two hundred four billion, eight hundred ninety-four million, three hundred eighty-five thousand, seven hundred ninety-four".