204634920 has 64 divisors (see below), whose sum is σ = 701608320. Its totient is φ = 46773504.

The previous prime is 204634919. The next prime is 204634939. The reversal of 204634920 is 29436402.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120967 + ... + 122646.

It is an arithmetic number, because the mean of its divisors is an integer number (10962630).

Almost surely, 2^204634920 is an apocalyptic number.

204634920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204634920 is an abundant number, since it is smaller than the sum of its proper divisors (496973400).

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

204634920 is a wasteful number, since it uses less digits than its factorization.

204634920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243634 (or 243630 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 204634920 is about 14305.0662354286. The cubic root of 204634920 is about 589.2866222313.

The spelling of 204634920 in words is "two hundred four million, six hundred thirty-four thousand, nine hundred twenty".