204810847890 has 128 divisors (see below), whose sum is σ = 564653306880. Its totient is φ = 47021356800.

The previous prime is 204810847789. The next prime is 204810847903. The reversal of 204810847890 is 98748018402.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32419012 + ... + 32425328.

It is an arithmetic number, because the mean of its divisors is an integer number (4411353960).

Almost surely, 2^204810847890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204810847890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282326653440).

204810847890 is an abundant number, since it is smaller than the sum of its proper divisors (359842458990).

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

204810847890 is a wasteful number, since it uses less digits than its factorization.

204810847890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11528.

The product of its (nonzero) digits is 1032192, while the sum is 51.

The spelling of 204810847890 in words is "two hundred four billion, eight hundred ten million, eight hundred forty-seven thousand, eight hundred ninety".