204899045 has 16 divisors (see below), whose sum is σ = 280370160. Its totient is φ = 142408704.

The previous prime is 204899041. The next prime is 204899063. The reversal of 204899045 is 540998402.

It can be written as a sum of positive squares in 8 ways, for example, as 9821956 + 195077089 = 3134^2 + 13967^2 .

It is a cyclic number.

It is not a de Polignac number, because 204899045 - 2² = 204899041 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 204898993 and 204899011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204899041) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 91610 + ... + 93819.

It is an arithmetic number, because the mean of its divisors is an integer number (17523135).

Almost surely, 2^204899045 is an apocalyptic number.

It is an amenable number.

204899045 is a deficient number, since it is larger than the sum of its proper divisors (75471115).

204899045 is a wasteful number, since it uses less digits than its factorization.

204899045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185464.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 204899045 is about 14314.2951275988. The cubic root of 204899045 is about 589.5400465778.

The spelling of 204899045 in words is "two hundred four million, eight hundred ninety-nine thousand, forty-five".