21327360 has 80 divisors (see below), whose sum is σ = 68205456. Its totient is φ = 5685248.

The previous prime is 21327353. The next prime is 21327389. The reversal of 21327360 is 6372312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a zygodrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 21327360.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6292 + ... + 9068.

Almost surely, 2^21327360 is an apocalyptic number.

21327360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21327360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34102728).

21327360 is an abundant number, since it is smaller than the sum of its proper divisors (46878096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21327360 is an equidigital number, since it uses as much as digits as its factorization.

21327360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803 (or 2787 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 21327360 is about 4618.1554759449. The cubic root of 21327360 is about 277.3186218363.

Adding to 21327360 its reverse (6372312), we get a palindrome (27699672).

The spelling of 21327360 in words is "twenty-one million, three hundred twenty-seven thousand, three hundred sixty".