21846647456 has 48 divisors (see below), whose sum is σ = 43330176288. Its totient is φ = 10842336000.

The previous prime is 21846647441. The next prime is 21846647483. The reversal of 21846647456 is 65474664812.

It is a junction number, because it is equal to n+sod(n) for n = 21846647398 and 21846647407.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4906031 + ... + 4910481.

It is an arithmetic number, because the mean of its divisors is an integer number (902712006).

Almost surely, 2^21846647456 is an apocalyptic number.

It is an amenable number.

21846647456 is a deficient number, since it is larger than the sum of its proper divisors (21483528832).

21846647456 is a wasteful number, since it uses less digits than its factorization.

21846647456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565 (or 5557 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 53.

The spelling of 21846647456 in words is "twenty-one billion, eight hundred forty-six million, six hundred forty-seven thousand, four hundred fifty-six".