204001005 has 32 divisors (see below), whose sum is σ = 370016640. Its totient is φ = 95143680.

The previous prime is 204001001. The next prime is 204001013. The reversal of 204001005 is 500100402.

It is not a de Polignac number, because 204001005 - 2² = 204001001 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204001001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23826 + ... + 31235.

It is an arithmetic number, because the mean of its divisors is an integer number (11563020).

Almost surely, 2^204001005 is an apocalyptic number.

It is an amenable number.

204001005 is a deficient number, since it is larger than the sum of its proper divisors (166015635).

204001005 is a wasteful number, since it uses less digits than its factorization.

204001005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55101.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 204001005 is about 14282.8920390795. The cubic root of 204001005 is about 588.6774983860.

Adding to 204001005 its reverse (500100402), we get a palindrome (704101407).

The spelling of 204001005 in words is "two hundred four million, one thousand, five".