21884056176 has 80 divisors (see below), whose sum is σ = 58476416000. Its totient is φ = 7044986880.

The previous prime is 21884056171. The next prime is 21884056211. The reversal of 21884056176 is 67165048812.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21884056171) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 727776 + ... + 757248.

It is an arithmetic number, because the mean of its divisors is an integer number (730955200).

Almost surely, 2^21884056176 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 21884056176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29238208000).

21884056176 is an abundant number, since it is smaller than the sum of its proper divisors (36592359824).

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

21884056176 is a wasteful number, since it uses less digits than its factorization.

21884056176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30014 (or 30008 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 21884056176 in words is "twenty-one billion, eight hundred eighty-four million, fifty-six thousand, one hundred seventy-six".