21314324 has 6 divisors (see below), whose sum is σ = 37300074. Its totient is φ = 10657160.

The previous prime is 21314303. The next prime is 21314327. The reversal of 21314324 is 42341312.

It can be written as a sum of positive squares in only one way, i.e., 19518724 + 1795600 = 4418^2 + 1340^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21314296 and 21314305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314327) 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, 2664287 + ... + 2664294.

It is an arithmetic number, because the mean of its divisors is an integer number (6216679).

Almost surely, 2^21314324 is an apocalyptic number.

It is an amenable number.

21314324 is a deficient number, since it is larger than the sum of its proper divisors (15985750).

21314324 is a wasteful number, since it uses less digits than its factorization.

21314324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5328585 (or 5328583 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 21314324 is about 4616.7438742040. The cubic root of 21314324 is about 277.2621081630.

Adding to 21314324 its reverse (42341312), we get a palindrome (63655636).

The spelling of 21314324 in words is "twenty-one million, three hundred fourteen thousand, three hundred twenty-four".