21327393 has 8 divisors (see below), whose sum is σ = 28796800. Its totient is φ = 14038128.

The previous prime is 21327389. The next prime is 21327407. The reversal of 21327393 is 39372312.

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

It is not a de Polignac number, because 21327393 - 2² = 21327389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21327393.

It is not an unprimeable number, because it can be changed into a prime (21327343) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 44758 + ... + 45231.

It is an arithmetic number, because the mean of its divisors is an integer number (3599600).

Almost surely, 2^21327393 is an apocalyptic number.

It is an amenable number.

21327393 is a deficient number, since it is larger than the sum of its proper divisors (7469407).

21327393 is an equidigital number, since it uses as much as digits as its factorization.

21327393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90071.

The product of its digits is 6804, while the sum is 30.

The square root of 21327393 is about 4618.1590487986. The cubic root of 21327393 is about 277.3187648687.

The spelling of 21327393 in words is "twenty-one million, three hundred twenty-seven thousand, three hundred ninety-three".