21313327 has 8 divisors (see below), whose sum is σ = 24396192. Its totient is φ = 18240000.

The previous prime is 21313301. The next prime is 21313333. The reversal of 21313327 is 72331312.

It is a happy number.

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 21313327 - 2⁷ = 21313199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21313298 and 21313307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3327 + ... + 7327.

It is an arithmetic number, because the mean of its divisors is an integer number (3049524).

Almost surely, 2^21313327 is an apocalyptic number.

21313327 is a deficient number, since it is larger than the sum of its proper divisors (3082865).

21313327 is an equidigital number, since it uses as much as digits as its factorization.

21313327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4769.

The product of its digits is 756, while the sum is 22.

The square root of 21313327 is about 4616.6358964077. The cubic root of 21313327 is about 277.2577850197.

Adding to 21313327 its reverse (72331312), we get a palindrome (93644639).

The spelling of 21313327 in words is "twenty-one million, three hundred thirteen thousand, three hundred twenty-seven".