21484296 has 48 divisors (see below), whose sum is σ = 58546800. Its totient is φ = 7117152.

The previous prime is 21484291. The next prime is 21484303. The reversal of 21484296 is 69248412.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21484296.

It is not an unprimeable number, because it can be changed into a prime (21484291) 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 11 ways as a sum of consecutive naturals, for example, 12055 + ... + 13721.

It is an arithmetic number, because the mean of its divisors is an integer number (1219725).

Almost surely, 2^21484296 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 21484296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29273400).

21484296 is an abundant number, since it is smaller than the sum of its proper divisors (37062504).

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

21484296 is a wasteful number, since it uses less digits than its factorization.

21484296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858 (or 1851 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 21484296 is about 4635.1155325407. The cubic root of 21484296 is about 277.9971705800.

The spelling of 21484296 in words is "twenty-one million, four hundred eighty-four thousand, two hundred ninety-six".