21242314 has 4 divisors (see below), whose sum is σ = 31863474. Its totient is φ = 10621156.

The previous prime is 21242237. The next prime is 21242339. The reversal of 21242314 is 41324212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19954089 + 1288225 = 4467^2 + 1135^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21242291 and 21242300.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310577 + ... + 5310580.

Almost surely, 2^21242314 is an apocalyptic number.

21242314 is a deficient number, since it is larger than the sum of its proper divisors (10621160).

21242314 is a wasteful number, since it uses less digits than its factorization.

21242314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10621159.

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

The square root of 21242314 is about 4608.9384895006. The cubic root of 21242314 is about 276.9495144473.

Adding to 21242314 its reverse (41324212), we get a palindrome (62566526).

The spelling of 21242314 in words is "twenty-one million, two hundred forty-two thousand, three hundred fourteen".