204844670806 has 32 divisors (see below), whose sum is σ = 329340761568. Its totient is φ = 95213099520.

The previous prime is 204844670791. The next prime is 204844670861. The reversal of 204844670806 is 608076448402.

It is a happy number.

It is a super-2 number, since 2×204844670806² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204844670806.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 18995136 + ... + 19005916.

It is an arithmetic number, because the mean of its divisors is an integer number (10291898799).

Almost surely, 2^204844670806 is an apocalyptic number.

204844670806 is a deficient number, since it is larger than the sum of its proper divisors (124496090762).

204844670806 is a wasteful number, since it uses less digits than its factorization.

204844670806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17616.

The product of its (nonzero) digits is 2064384, while the sum is 49.

The spelling of 204844670806 in words is "two hundred four billion, eight hundred forty-four million, six hundred seventy thousand, eight hundred six".