21806132727 has 8 divisors (see below), whose sum is σ = 29076088320. Its totient is φ = 14536799480.

The previous prime is 21806132687. The next prime is 21806132749. The reversal of 21806132727 is 72723160812.

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

It is a cyclic number.

It is not a de Polignac number, because 21806132727 - 2²⁶ = 21739023863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21806132027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66549 + ... + 219182.

It is an arithmetic number, because the mean of its divisors is an integer number (3634511040).

Almost surely, 2^21806132727 is an apocalyptic number.

21806132727 is a deficient number, since it is larger than the sum of its proper divisors (7269955593).

21806132727 is a wasteful number, since it uses less digits than its factorization.

21806132727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311173.

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 21806132727 in words is "twenty-one billion, eight hundred six million, one hundred thirty-two thousand, seven hundred twenty-seven".