21717464614 has 4 divisors (see below), whose sum is σ = 32576196924. Its totient is φ = 10858732306.

The previous prime is 21717464597. The next prime is 21717464653. The reversal of 21717464614 is 41646471712.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5429366152 + ... + 5429366155.

It is an arithmetic number, because the mean of its divisors is an integer number (8144049231).

Almost surely, 2^21717464614 is an apocalyptic number.

21717464614 is a deficient number, since it is larger than the sum of its proper divisors (10858732310).

21717464614 is a wasteful number, since it uses less digits than its factorization.

21717464614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10858732309.

The product of its digits is 225792, while the sum is 43.

The spelling of 21717464614 in words is "twenty-one billion, seven hundred seventeen million, four hundred sixty-four thousand, six hundred fourteen".