21214814 has 8 divisors (see below), whose sum is σ = 31868640. Its totient is φ = 10591936.

The previous prime is 21214777. The next prime is 21214847. The reversal of 21214814 is 41841212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21214814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5939 + ... + 8814.

It is an arithmetic number, because the mean of its divisors is an integer number (3983580).

Almost surely, 2^21214814 is an apocalyptic number.

21214814 is a deficient number, since it is larger than the sum of its proper divisors (10653826).

21214814 is a wasteful number, since it uses less digits than its factorization.

21214814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15474.

The product of its digits is 512, while the sum is 23.

The square root of 21214814 is about 4605.9541899589. The cubic root of 21214814 is about 276.8299511928.

The spelling of 21214814 in words is "twenty-one million, two hundred fourteen thousand, eight hundred fourteen".