204136363818 has 48 divisors (see below), whose sum is σ = 450702271656. Its totient is φ = 66752449920.

The previous prime is 204136363757. The next prime is 204136363841. The reversal of 204136363818 is 818363631402.

204136363818 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 3 + 6 + 3 + 638 + 1 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 133997727249 + 70138636569 = 366057^2 + 264837^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13788396 + ... + 13803192.

Almost surely, 2^204136363818 is an apocalyptic number.

204136363818 is an abundant number, since it is smaller than the sum of its proper divisors (246565907838).

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

204136363818 is a wasteful number, since it uses less digits than its factorization.

204136363818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29319 (or 29316 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 204136363818 in words is "two hundred four billion, one hundred thirty-six million, three hundred sixty-three thousand, eight hundred eighteen".