21184482 has 64 divisors (see below), whose sum is σ = 49766400. Its totient is φ = 5940480.

The previous prime is 21184469. The next prime is 21184511. The reversal of 21184482 is 28448112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88519 + ... + 88757.

It is an arithmetic number, because the mean of its divisors is an integer number (777600).

Almost surely, 2^21184482 is an apocalyptic number.

21184482 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21184482, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24883200).

21184482 is an abundant number, since it is smaller than the sum of its proper divisors (28581918).

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

21184482 is a wasteful number, since it uses less digits than its factorization.

21184482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its digits is 4096, while the sum is 30.

The square root of 21184482 is about 4602.6603176858. The cubic root of 21184482 is about 276.6979552040.

The spelling of 21184482 in words is "twenty-one million, one hundred eighty-four thousand, four hundred eighty-two".