21608486404 has 12 divisors (see below), whose sum is σ = 37914629200. Its totient is φ = 10775735208.

The previous prime is 21608486387. The next prime is 21608486461. The reversal of 21608486404 is 40468480612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7125294 + ... + 7128325.

Almost surely, 2^21608486404 is an apocalyptic number.

It is an amenable number.

21608486404 is a deficient number, since it is larger than the sum of its proper divisors (16306142796).

21608486404 is a wasteful number, since it uses less digits than its factorization.

21608486404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14254002 (or 14254000 counting only the distinct ones).

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

The spelling of 21608486404 in words is "twenty-one billion, six hundred eight million, four hundred eighty-six thousand, four hundred four".