20963847168 has 704 divisors, whose sum is σ = 73479767040. Its totient is φ = 5912248320.

The previous prime is 20963847127. The next prime is 20963847181. The reversal of 20963847168 is 86174836902.

20963847168 is a `hidden beast` number, since 20 + 96 + 3 + 8 + 471 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (704).

It is a Harshad number since it is a multiple of its sum of digits (54).

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 63 ways as a sum of consecutive naturals, for example, 566590446 + ... + 566590482.

Almost surely, 2^20963847168 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 20963847168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36739883520).

20963847168 is an abundant number, since it is smaller than the sum of its proper divisors (52515919872).

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

20963847168 is an equidigital number, since it uses as much as digits as its factorization.

20963847168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 20963847168 in words is "twenty billion, nine hundred sixty-three million, eight hundred forty-seven thousand, one hundred sixty-eight".