21321314 has 8 divisors (see below), whose sum is σ = 36550848. Its totient is φ = 9137700.

The previous prime is 21321301. The next prime is 21321331. The reversal of 21321314 is 41312312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21321292 and 21321301.

It is an unprimeable number.

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, 761462 + ... + 761489.

It is an arithmetic number, because the mean of its divisors is an integer number (4568856).

Almost surely, 2^21321314 is an apocalyptic number.

21321314 is a deficient number, since it is larger than the sum of its proper divisors (15229534).

21321314 is a wasteful number, since it uses less digits than its factorization.

21321314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522960.

The product of its digits is 144, while the sum is 17.

The square root of 21321314 is about 4617.5008391986. The cubic root of 21321314 is about 277.2924140786.

Adding to 21321314 its reverse (41312312), we get a palindrome (62633626).

The spelling of 21321314 in words is "twenty-one million, three hundred twenty-one thousand, three hundred fourteen".