21093516008 has 16 divisors (see below), whose sum is σ = 39660516000. Its totient is φ = 10517378416.

The previous prime is 21093515983. The next prime is 21093516019. The reversal of 21093516008 is 80061539012.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3669398 + ... + 3675141.

It is an arithmetic number, because the mean of its divisors is an integer number (2478782250).

Almost surely, 2^21093516008 is an apocalyptic number.

It is an amenable number.

21093516008 is a deficient number, since it is larger than the sum of its proper divisors (18566999992).

21093516008 is a wasteful number, since it uses less digits than its factorization.

21093516008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7344904 (or 7344900 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 21093516008 in words is "twenty-one billion, ninety-three million, five hundred sixteen thousand, eight".