21688143214 has 8 divisors (see below), whose sum is σ = 32539223448. Its totient is φ = 10841735400.

The previous prime is 21688143163. The next prime is 21688143241. The reversal of 21688143214 is 41234188612.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1156477 + ... + 1175080.

It is an arithmetic number, because the mean of its divisors is an integer number (4067402931).

Almost surely, 2^21688143214 is an apocalyptic number.

21688143214 is a deficient number, since it is larger than the sum of its proper divisors (10851080234).

21688143214 is a wasteful number, since it uses less digits than its factorization.

21688143214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336210.

The product of its digits is 73728, while the sum is 40.

The spelling of 21688143214 in words is "twenty-one billion, six hundred eighty-eight million, one hundred forty-three thousand, two hundred fourteen".