21113024 has 14 divisors (see below), whose sum is σ = 41896284. Its totient is φ = 10556480.

The previous prime is 21113023. The next prime is 21113041. The reversal of 21113024 is 42031112.

It is not an unprimeable number, because it can be changed into a prime (21113023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164882 + ... + 165009.

Almost surely, 2^21113024 is an apocalyptic number.

It is an amenable number.

21113024 is a deficient number, since it is larger than the sum of its proper divisors (20783260).

21113024 is an equidigital number, since it uses as much as digits as its factorization.

21113024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329903 (or 329893 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21113024 is about 4594.8910759669. The cubic root of 21113024 is about 276.3864920659.

Adding to 21113024 its reverse (42031112), we get a palindrome (63144136).

The spelling of 21113024 in words is "twenty-one million, one hundred thirteen thousand, twenty-four".