21886752 has 48 divisors (see below), whose sum is σ = 60836832. Its totient is φ = 6865920.

The previous prime is 21886751. The next prime is 21886757. The reversal of 21886752 is 25768812.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 21886752.

It is not an unprimeable number, because it can be changed into a prime (21886751) 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 7 ways as a sum of consecutive naturals, for example, 5074 + ... + 8337.

It is an arithmetic number, because the mean of its divisors is an integer number (1267434).

Almost surely, 2^21886752 is an apocalyptic number.

It is an amenable number.

21886752 is an abundant number, since it is smaller than the sum of its proper divisors (38950080).

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

21886752 is a wasteful number, since it uses less digits than its factorization.

21886752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13441 (or 13433 counting only the distinct ones).

The product of its digits is 53760, while the sum is 39.

The square root of 21886752 is about 4678.3279064213. The cubic root of 21886752 is about 279.7223097255.

The spelling of 21886752 in words is "twenty-one million, eight hundred eighty-six thousand, seven hundred fifty-two".