21113324 has 6 divisors (see below), whose sum is σ = 36948324. Its totient is φ = 10556660.

The previous prime is 21113317. The next prime is 21113329. The reversal of 21113324 is 42331112.

It is not an unprimeable number, because it can be changed into a prime (21113329) 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 as a sum of consecutive naturals, namely, 2639162 + ... + 2639169.

It is an arithmetic number, because the mean of its divisors is an integer number (6158054).

Almost surely, 2^21113324 is an apocalyptic number.

It is an amenable number.

21113324 is a deficient number, since it is larger than the sum of its proper divisors (15835000).

21113324 is a wasteful number, since it uses less digits than its factorization.

21113324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5278335 (or 5278333 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 21113324 is about 4594.9237208032. The cubic root of 21113324 is about 276.3878011403.

Adding to 21113324 its reverse (42331112), we get a palindrome (63444436).

The spelling of 21113324 in words is "twenty-one million, one hundred thirteen thousand, three hundred twenty-four".