208403680084 has 24 divisors (see below), whose sum is σ = 377300566440. Its totient is φ = 100603862016.

The previous prime is 208403680081. The next prime is 208403680099. The reversal of 208403680084 is 480086304802.

It can be written as a sum of positive squares in 4 ways, for example, as 58811100100 + 149592579984 = 242510^2 + 386772^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 208403680084.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208403680081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4148364 + ... + 4198300.

It is an arithmetic number, because the mean of its divisors is an integer number (15720856935).

Almost surely, 2^208403680084 is an apocalyptic number.

It is an amenable number.

208403680084 is a deficient number, since it is larger than the sum of its proper divisors (168896886356).

208403680084 is a wasteful number, since it uses less digits than its factorization.

208403680084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85947 (or 85945 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 43.

Adding to 208403680084 its reverse (480086304802), we get a palindrome (688489984886).

The spelling of 208403680084 in words is "two hundred eight billion, four hundred three million, six hundred eighty thousand, eighty-four".