21712714 has 8 divisors (see below), whose sum is σ = 32598720. Its totient is φ = 10846476.

The previous prime is 21712697. The next prime is 21712729. The reversal of 21712714 is 41721712.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1794 + ... + 6829.

It is an arithmetic number, because the mean of its divisors is an integer number (4074840).

Almost surely, 2^21712714 is an apocalyptic number.

21712714 is a deficient number, since it is larger than the sum of its proper divisors (10886006).

21712714 is a wasteful number, since it uses less digits than its factorization.

21712714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9884.

The product of its digits is 784, while the sum is 25.

The square root of 21712714 is about 4659.6903330586. The cubic root of 21712714 is about 278.9789084059.

The spelling of 21712714 in words is "twenty-one million, seven hundred twelve thousand, seven hundred fourteen".