21647302870 has 64 divisors (see below), whose sum is σ = 41586333120. Its totient is φ = 8089915392.

The previous prime is 21647302841. The next prime is 21647302913. The reversal of 21647302870 is 7820374612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4084062 + ... + 4089358.

It is an arithmetic number, because the mean of its divisors is an integer number (649786455).

Almost surely, 2^21647302870 is an apocalyptic number.

21647302870 is a deficient number, since it is larger than the sum of its proper divisors (19939030250).

21647302870 is a wasteful number, since it uses less digits than its factorization.

21647302870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5617.

The product of its (nonzero) digits is 112896, while the sum is 40.

The spelling of 21647302870 in words is "twenty-one billion, six hundred forty-seven million, three hundred two thousand, eight hundred seventy".