204243340020 has 48 divisors (see below), whose sum is σ = 580416906048. Its totient is φ = 53651980800.

The previous prime is 204243339977. The next prime is 204243340061. The reversal of 204243340020 is 20043342402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25399381 + ... + 25407420.

It is an arithmetic number, because the mean of its divisors is an integer number (12092018876).

Almost surely, 2^204243340020 is an apocalyptic number.

204243340020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204243340020 is an abundant number, since it is smaller than the sum of its proper divisors (376173566028).

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

204243340020 is a wasteful number, since it uses less digits than its factorization.

204243340020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50806880 (or 50806878 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 204243340020 its reverse (20043342402), we get a palindrome (224286682422).

The spelling of 204243340020 in words is "two hundred four billion, two hundred forty-three million, three hundred forty thousand, twenty".