21606364214 has 8 divisors (see below), whose sum is σ = 32453168400. Its totient is φ = 10788641416.

The previous prime is 21606364187. The next prime is 21606364259. The reversal of 21606364214 is 41246360612.

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, 7268489 + ... + 7271460.

It is an arithmetic number, because the mean of its divisors is an integer number (4056646050).

Almost surely, 2^21606364214 is an apocalyptic number.

21606364214 is a deficient number, since it is larger than the sum of its proper divisors (10846804186).

21606364214 is a wasteful number, since it uses less digits than its factorization.

21606364214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14540694.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 21606364214 in words is "twenty-one billion, six hundred six million, three hundred sixty-four thousand, two hundred fourteen".