21466896 has 80 divisors (see below), whose sum is σ = 61216320. Its totient is φ = 6428160.

The previous prime is 21466883. The next prime is 21466897. The reversal of 21466896 is 69866412.

It is not an unprimeable number, because it can be changed into a prime (21466897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57366 + ... + 57738.

It is an arithmetic number, because the mean of its divisors is an integer number (765204).

Almost surely, 2^21466896 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 21466896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30608160).

21466896 is an abundant number, since it is smaller than the sum of its proper divisors (39749424).

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

21466896 is a wasteful number, since it uses less digits than its factorization.

21466896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 498 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 21466896 is about 4633.2381764809. The cubic root of 21466896 is about 277.9221009072.

The spelling of 21466896 in words is "twenty-one million, four hundred sixty-six thousand, eight hundred ninety-six".