21843046656 has 144 divisors (see below), whose sum is σ = 65261649600. Its totient is φ = 7205732352.

The previous prime is 21843046639. The next prime is 21843046711. The reversal of 21843046656 is 65664034812.

21843046656 is a `hidden beast` number, since 2 + 184 + 3 + 0 + 466 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 654175 + ... + 686753.

It is an arithmetic number, because the mean of its divisors is an integer number (453205900).

Almost surely, 2^21843046656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21843046656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32630824800).

21843046656 is an abundant number, since it is smaller than the sum of its proper divisors (43418602944).

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

21843046656 is an equidigital number, since it uses as much as digits as its factorization.

21843046656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32701 (or 32681 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 21843046656 in words is "twenty-one billion, eight hundred forty-three million, forty-six thousand, six hundred fifty-six".