21326484 has 24 divisors (see below), whose sum is σ = 51478560. Its totient is φ = 6863584.

The previous prime is 21326479. The next prime is 21326527. The reversal of 21326484 is 48462312.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 30294 + ... + 30989.

It is an arithmetic number, because the mean of its divisors is an integer number (2144940).

Almost surely, 2^21326484 is an apocalyptic number.

It is an amenable number.

21326484 is an abundant number, since it is smaller than the sum of its proper divisors (30152076).

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

21326484 is a wasteful number, since it uses less digits than its factorization.

21326484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61319 (or 61317 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 21326484 is about 4618.0606319103. The cubic root of 21326484 is about 277.3148249226.

Adding to 21326484 its reverse (48462312), we get a palindrome (69788796).

The spelling of 21326484 in words is "twenty-one million, three hundred twenty-six thousand, four hundred eighty-four".