21314328 has 96 divisors (see below), whose sum is σ = 64838400. Its totient is φ = 5718528.

The previous prime is 21314327. The next prime is 21314357. The reversal of 21314328 is 82341312.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21314298 and 21314307.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48333 + ... + 48771.

It is an arithmetic number, because the mean of its divisors is an integer number (675400).

Almost surely, 2^21314328 is an apocalyptic number.

21314328 is a gapful number since it is divisible by the number (28) 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 21314328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32419200).

21314328 is an abundant number, since it is smaller than the sum of its proper divisors (43524072).

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

21314328 is a wasteful number, since it uses less digits than its factorization.

21314328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 468 counting only the distinct ones).

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

The square root of 21314328 is about 4616.7443074097. The cubic root of 21314328 is about 277.2621255074.

It can be divided in two parts, 213 and 14328, that added together give a palindrome (14541).

The spelling of 21314328 in words is "twenty-one million, three hundred fourteen thousand, three hundred twenty-eight".