21314382 has 8 divisors (see below), whose sum is σ = 42628776. Its totient is φ = 7104792.

The previous prime is 21314357. The next prime is 21314387. The reversal of 21314382 is 28341312.

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

21314382 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776193 + ... + 1776204.

It is an arithmetic number, because the mean of its divisors is an integer number (5328597).

Almost surely, 2^21314382 is an apocalyptic number.

21314382 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21314382 is a wasteful number, since it uses less digits than its factorization.

21314382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552402.

The product of its digits is 1152, while the sum is 24.

The square root of 21314382 is about 4616.7501556831. The cubic root of 21314382 is about 277.2623596557.

Adding to 21314382 its reverse (28341312), we get a palindrome (49655694).

The spelling of 21314382 in words is "twenty-one million, three hundred fourteen thousand, three hundred eighty-two".