21065589614 has 8 divisors (see below), whose sum is σ = 31601919648. Its totient is φ = 10531616400.

The previous prime is 21065589553. The next prime is 21065589659. The reversal of 21065589614 is 41698556012.

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

It is a Curzon number.

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, 566687 + ... + 602714.

It is an arithmetic number, because the mean of its divisors is an integer number (3950239956).

Almost surely, 2^21065589614 is an apocalyptic number.

21065589614 is a deficient number, since it is larger than the sum of its proper divisors (10536330034).

21065589614 is a wasteful number, since it uses less digits than its factorization.

21065589614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178410.

The product of its (nonzero) digits is 518400, while the sum is 47.

The spelling of 21065589614 in words is "twenty-one billion, sixty-five million, five hundred eighty-nine thousand, six hundred fourteen".