21482736 has 160 divisors (see below), whose sum is σ = 66424320. Its totient is φ = 5913600.

The previous prime is 21482717. The next prime is 21482743. The reversal of 21482736 is 63728412.

21482736 is nontrivially palindromic in base 14.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 21482697 and 21482706.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 352146 + ... + 352206.

It is an arithmetic number, because the mean of its divisors is an integer number (415152).

Almost surely, 2^21482736 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 21482736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33212160).

21482736 is an abundant number, since it is smaller than the sum of its proper divisors (44941584).

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

21482736 is a wasteful number, since it uses less digits than its factorization.

21482736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 129 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 21482736 is about 4634.9472488908. The cubic root of 21482736 is about 277.9904418500.

It can be divided in two parts, 2148 and 2736, that added together give a palindrome (4884).

The spelling of 21482736 in words is "twenty-one million, four hundred eighty-two thousand, seven hundred thirty-six".