204550020 has 36 divisors (see below), whose sum is σ = 620468940. Its totient is φ = 54546624.

The previous prime is 204550009. The next prime is 204550033. The reversal of 204550020 is 20055402.

It can be written as a sum of positive squares in 2 ways, for example, as 124411716 + 80138304 = 11154^2 + 8952^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 204549975 and 204550002.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 568015 + ... + 568374.

Almost surely, 2^204550020 is an apocalyptic number.

204550020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204550020 is an abundant number, since it is smaller than the sum of its proper divisors (415918920).

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

204550020 is a wasteful number, since it uses less digits than its factorization.

204550020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136404 (or 1136399 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 204550020 is about 14302.0984474307. The cubic root of 204550020 is about 589.2051155253.

The spelling of 204550020 in words is "two hundred four million, five hundred fifty thousand, twenty".