204636530 has 16 divisors (see below), whose sum is σ = 420966720. Its totient is φ = 70161072.

The previous prime is 204636521. The next prime is 204636533. The reversal of 204636530 is 35636402.

It is a super-2 number, since 2×204636530² = 83752218820881800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 204636493 and 204636502.

It is not an unprimeable number, because it can be changed into a prime (204636533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1461620 + ... + 1461759.

It is an arithmetic number, because the mean of its divisors is an integer number (26310420).

Almost surely, 2^204636530 is an apocalyptic number.

204636530 is an abundant number, since it is smaller than the sum of its proper divisors (216330190).

204636530 is a wasteful number, since it uses less digits than its factorization.

204636530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2923393.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 204636530 is about 14305.1225090874. The cubic root of 204636530 is about 589.2881676648.

The spelling of 204636530 in words is "two hundred four million, six hundred thirty-six thousand, five hundred thirty".