21244482 has 48 divisors (see below), whose sum is σ = 53027520. Its totient is φ = 6021216.

The previous prime is 21244481. The next prime is 21244507. The reversal of 21244482 is 28444212.

21244482 is a `hidden beast` number, since 212 + 4 + 448 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (21244481) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16908 + ... + 18120.

It is an arithmetic number, because the mean of its divisors is an integer number (1104740).

Almost surely, 2^21244482 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21244482, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26513760).

21244482 is an abundant number, since it is smaller than the sum of its proper divisors (31783038).

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

21244482 is a wasteful number, since it uses less digits than its factorization.

21244482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1367 (or 1364 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 21244482 is about 4609.1736786543. The cubic root of 21244482 is about 276.9589359903.

Adding to 21244482 its reverse (28444212), we get a palindrome (49688694).

The spelling of 21244482 in words is "twenty-one million, two hundred forty-four thousand, four hundred eighty-two".