204995895 has 32 divisors (see below), whose sum is σ = 368589312. Its totient is φ = 96531072.

The previous prime is 204995893. The next prime is 204995981. The reversal of 204995895 is 598599402.

It is not a de Polignac number, because 204995895 - 2¹ = 204995893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204995893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18369 + ... + 27338.

It is an arithmetic number, because the mean of its divisors is an integer number (11518416).

Almost surely, 2^204995895 is an apocalyptic number.

204995895 is a deficient number, since it is larger than the sum of its proper divisors (163593417).

204995895 is a wasteful number, since it uses less digits than its factorization.

204995895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45751.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The square root of 204995895 is about 14317.6777097405. The cubic root of 204995895 is about 589.6329182646.

The spelling of 204995895 in words is "two hundred four million, nine hundred ninety-five thousand, eight hundred ninety-five".