21314314 has 24 divisors (see below), whose sum is σ = 39152160. Its totient is φ = 8653176.

The previous prime is 21314303. The next prime is 21314327. The reversal of 21314314 is 41341312.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 21314291 and 21314300.

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 11 ways as a sum of consecutive naturals, for example, 3862 + ... + 7585.

It is an arithmetic number, because the mean of its divisors is an integer number (1631340).

Almost surely, 2^21314314 is an apocalyptic number.

21314314 is a deficient number, since it is larger than the sum of its proper divisors (17837846).

21314314 is a wasteful number, since it uses less digits than its factorization.

21314314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11482 (or 11475 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 21314314 is about 4616.7427911895. The cubic root of 21314314 is about 277.2620648022.

Adding to 21314314 its reverse (41341312), we get a palindrome (62655626).

The spelling of 21314314 in words is "twenty-one million, three hundred fourteen thousand, three hundred fourteen".