21204002308 has 12 divisors (see below), whose sum is σ = 38012053212. Its totient is φ = 10343415680.

The previous prime is 21204002293. The next prime is 21204002327. The reversal of 21204002308 is 80320040212.

It can be written as a sum of positive squares in 2 ways, for example, as 2115264064 + 19088738244 = 45992^2 + 138162^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 64646185 + ... + 64646512.

It is an arithmetic number, because the mean of its divisors is an integer number (3167671101).

Almost surely, 2^21204002308 is an apocalyptic number.

It is an amenable number.

21204002308 is a deficient number, since it is larger than the sum of its proper divisors (16808050904).

21204002308 is a wasteful number, since it uses less digits than its factorization.

21204002308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129292742 (or 129292740 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The spelling of 21204002308 in words is "twenty-one billion, two hundred four million, two thousand, three hundred eight".