21548316008 has 16 divisors (see below), whose sum is σ = 41706418560. Its totient is φ = 10426604400.

The previous prime is 21548316001. The next prime is 21548316037. The reversal of 21548316008 is 80061384512.

It is not an unprimeable number, because it can be changed into a prime (21548316001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43443938 + ... + 43444433.

It is an arithmetic number, because the mean of its divisors is an integer number (2606651160).

Almost surely, 2^21548316008 is an apocalyptic number.

It is an amenable number.

21548316008 is a deficient number, since it is larger than the sum of its proper divisors (20158102552).

21548316008 is a wasteful number, since it uses less digits than its factorization.

21548316008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86888408 (or 86888404 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 21548316008 in words is "twenty-one billion, five hundred forty-eight million, three hundred sixteen thousand, eight".