21327116 has 6 divisors (see below), whose sum is σ = 37322460. Its totient is φ = 10663556.

The previous prime is 21327109. The next prime is 21327149. The reversal of 21327116 is 61172312.

It is a junction number, because it is equal to n+sod(n) for n = 21327091 and 21327100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2665886 + ... + 2665893.

It is an arithmetic number, because the mean of its divisors is an integer number (6220410).

Almost surely, 2^21327116 is an apocalyptic number.

It is an amenable number.

21327116 is a deficient number, since it is larger than the sum of its proper divisors (15995344).

21327116 is a wasteful number, since it uses less digits than its factorization.

21327116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5331783 (or 5331781 counting only the distinct ones).

The product of its digits is 504, while the sum is 23.

The square root of 21327116 is about 4618.1290583958. The cubic root of 21327116 is about 277.3175642589.

Adding to 21327116 its reverse (61172312), we get a palindrome (82499428).

The spelling of 21327116 in words is "twenty-one million, three hundred twenty-seven thousand, one hundred sixteen".