21711327 has 16 divisors (see below), whose sum is σ = 31771008. Its totient is φ = 13078880.

The previous prime is 21711317. The next prime is 21711331. The reversal of 21711327 is 72311712.

It is a cyclic number.

It is not a de Polignac number, because 21711327 - 2⁸ = 21711071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21711297 and 21711306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21711307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3808 + ... + 7610.

It is an arithmetic number, because the mean of its divisors is an integer number (1985688).

Almost surely, 2^21711327 is an apocalyptic number.

21711327 is a deficient number, since it is larger than the sum of its proper divisors (10059681).

21711327 is a wasteful number, since it uses less digits than its factorization.

21711327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990.

The product of its digits is 588, while the sum is 24.

The square root of 21711327 is about 4659.5415010492. The cubic root of 21711327 is about 278.9729679235.

The spelling of 21711327 in words is "twenty-one million, seven hundred eleven thousand, three hundred twenty-seven".