21616327712 has 48 divisors (see below), whose sum is σ = 48946605120. Its totient is φ = 9205118208.

The previous prime is 21616327709. The next prime is 21616327723. The reversal of 21616327712 is 21772361612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272162 + ... + 342497.

It is an arithmetic number, because the mean of its divisors is an integer number (1019720940).

Almost surely, 2^21616327712 is an apocalyptic number.

It is an amenable number.

21616327712 is an abundant number, since it is smaller than the sum of its proper divisors (27330277408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21616327712 is a wasteful number, since it uses less digits than its factorization.

21616327712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614833 (or 614825 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The spelling of 21616327712 in words is "twenty-one billion, six hundred sixteen million, three hundred twenty-seven thousand, seven hundred twelve".