21413024 has 24 divisors (see below), whose sum is σ = 42401268. Its totient is φ = 10644480.

The previous prime is 21413009. The next prime is 21413027. The reversal of 21413024 is 42031412.

It can be written as a sum of positive squares in 2 ways, for example, as 14961424 + 6451600 = 3868^2 + 2540^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21412993 and 21413011.

It is not an unprimeable number, because it can be changed into a prime (21413027) 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 3 ways as a sum of consecutive naturals, for example, 3944 + ... + 7640.

Almost surely, 2^21413024 is an apocalyptic number.

It is an amenable number.

21413024 is a deficient number, since it is larger than the sum of its proper divisors (20988244).

21413024 is a wasteful number, since it uses less digits than its factorization.

21413024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888 (or 3880 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21413024 is about 4627.4208799287. The cubic root of 21413024 is about 277.6894207631.

Adding to 21413024 its reverse (42031412), we get a palindrome (63444436).

The spelling of 21413024 in words is "twenty-one million, four hundred thirteen thousand, twenty-four".