21412324 has 24 divisors (see below), whose sum is σ = 39002040. Its totient is φ = 10273536.

The previous prime is 21412319. The next prime is 21412337. The reversal of 21412324 is 42321412.

It can be written as a sum of positive squares in 4 ways, for example, as 4040100 + 17372224 = 2010^2 + 4168^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22384 + ... + 23320.

It is an arithmetic number, because the mean of its divisors is an integer number (1625085).

Almost surely, 2^21412324 is an apocalyptic number.

It is an amenable number.

21412324 is a deficient number, since it is larger than the sum of its proper divisors (17589716).

21412324 is a wasteful number, since it uses less digits than its factorization.

21412324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1165 counting only the distinct ones).

The product of its digits is 384, while the sum is 19.

The square root of 21412324 is about 4627.3452432253. The cubic root of 21412324 is about 277.6863948054.

Adding to 21412324 its reverse (42321412), we get a palindrome (63733736).

It can be divided in two parts, 21412 and 324, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 21412324 in words is "twenty-one million, four hundred twelve thousand, three hundred twenty-four".