21719314 has 8 divisors (see below), whose sum is σ = 33995520. Its totient is φ = 10387476.

The previous prime is 21719309. The next prime is 21719339. The reversal of 21719314 is 41391712.

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

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, 236034 + ... + 236125.

It is an arithmetic number, because the mean of its divisors is an integer number (4249440).

Almost surely, 2^21719314 is an apocalyptic number.

21719314 is a deficient number, since it is larger than the sum of its proper divisors (12276206).

21719314 is a wasteful number, since it uses less digits than its factorization.

21719314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472184.

The product of its digits is 1512, while the sum is 28.

The square root of 21719314 is about 4660.3984808168. The cubic root of 21719314 is about 279.0071725566.

The spelling of 21719314 in words is "twenty-one million, seven hundred nineteen thousand, three hundred fourteen".