21321482 has 32 divisors (see below), whose sum is σ = 39631872. Its totient is φ = 8377344.

The previous prime is 21321481. The next prime is 21321493. The reversal of 21321482 is 28412312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21321481) 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 15 ways as a sum of consecutive naturals, for example, 34823 + ... + 35429.

It is an arithmetic number, because the mean of its divisors is an integer number (1238496).

Almost surely, 2^21321482 is an apocalyptic number.

21321482 is a deficient number, since it is larger than the sum of its proper divisors (18310390).

21321482 is a wasteful number, since it uses less digits than its factorization.

21321482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822.

The product of its digits is 768, while the sum is 23.

The square root of 21321482 is about 4617.5190308216. The cubic root of 21321482 is about 277.2931423796.

Adding to 21321482 its reverse (28412312), we get a palindrome (49733794).

The spelling of 21321482 in words is "twenty-one million, three hundred twenty-one thousand, four hundred eighty-two".