21483532 has 48 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 8819712.

The previous prime is 21483523. The next prime is 21483533. The reversal of 21483532 is 23538412.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 21483532.

It is not an unprimeable number, because it can be changed into a prime (21483533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92088 + ... + 92320.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^21483532 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 21483532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22407840).

21483532 is an abundant number, since it is smaller than the sum of its proper divisors (23332148).

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

21483532 is a wasteful number, since it uses less digits than its factorization.

21483532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 368 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 21483532 is about 4635.0331174653. The cubic root of 21483532 is about 277.9938752683.

The spelling of 21483532 in words is "twenty-one million, four hundred eighty-three thousand, five hundred thirty-two".