21482 has 8 divisors (see below), whose sum is σ = 33696. Its totient is φ = 10252.

The previous prime is 21481. The next prime is 21487. The reversal of 21482 is 28412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21482² = 922952648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21482.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 21482.

It is not an unprimeable number, because it can be changed into a prime (21481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188 + ... + 279.

It is an arithmetic number, because the mean of its divisors is an integer number (4212).

2²¹⁴⁸² is an apocalyptic number.

21482 is a deficient number, since it is larger than the sum of its proper divisors (12214).

21482 is a wasteful number, since it uses less digits than its factorization.

21482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492.

The product of its digits is 128, while the sum is 17.

The square root of 21482 is about 146.5673906433. The cubic root of 21482 is about 27.7987267157.

Adding to 21482 its reverse (28412), we get a palindrome (49894).

The spelling of 21482 in words is "twenty-one thousand, four hundred eighty-two".