204615020 has 12 divisors (see below), whose sum is σ = 429691584. Its totient is φ = 81846000.

The previous prime is 204615013. The next prime is 204615091. The reversal of 204615020 is 20516402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10230751 = 204615020 / (2 + 0 + 4 + 6 + 1 + 5 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 204614983 and 204615001.

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 3 ways as a sum of consecutive naturals, for example, 5115356 + ... + 5115395.

It is an arithmetic number, because the mean of its divisors is an integer number (35807632).

Almost surely, 2^204615020 is an apocalyptic number.

204615020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204615020 is an abundant number, since it is smaller than the sum of its proper divisors (225076564).

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

204615020 is a wasteful number, since it uses less digits than its factorization.

204615020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10230760 (or 10230758 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 204615020 is about 14304.3706607456. The cubic root of 204615020 is about 589.2675196201.

The spelling of 204615020 in words is "two hundred four million, six hundred fifteen thousand, twenty".