204547680 has 144 divisors (see below), whose sum is σ = 724009104. Its totient is φ = 54535680.

The previous prime is 204547649. The next prime is 204547697. The reversal of 204547680 is 86745402.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36250 + ... + 41510.

It is an arithmetic number, because the mean of its divisors is an integer number (5027841).

Almost surely, 2^204547680 is an apocalyptic number.

204547680 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 204547680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362004552).

204547680 is an abundant number, since it is smaller than the sum of its proper divisors (519461424).

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

204547680 is an equidigital number, since it uses as much as digits as its factorization.

204547680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291 (or 5271 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 204547680 is about 14302.0166410195. The cubic root of 204547680 is about 589.2028687314.

The spelling of 204547680 in words is "two hundred four million, five hundred forty-seven thousand, six hundred eighty".