21447682112 has 56 divisors (see below), whose sum is σ = 42800915160. Its totient is φ = 10663362560.

The previous prime is 21447682097. The next prime is 21447682133. The reversal of 21447682112 is 21128674412.

It can be written as a sum of positive squares in 4 ways, for example, as 17695384576 + 3752297536 = 133024^2 + 61256^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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, 17450714 + ... + 17451942.

Almost surely, 2^21447682112 is an apocalyptic number.

It is an amenable number.

21447682112 is a deficient number, since it is larger than the sum of its proper divisors (21353233048).

21447682112 is a wasteful number, since it uses less digits than its factorization.

21447682112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559 (or 2549 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The spelling of 21447682112 in words is "twenty-one billion, four hundred forty-seven million, six hundred eighty-two thousand, one hundred twelve".