21314024320 has 64 divisors (see below), whose sum is σ = 51031938240. Its totient is φ = 8512542720.

The previous prime is 21314024311. The next prime is 21314024321. The reversal of 21314024320 is 2342041312.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 21314024291 and 21314024300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21314024321) 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, 397849 + ... + 448231.

It is an arithmetic number, because the mean of its divisors is an integer number (797374035).

Almost surely, 2^21314024320 is an apocalyptic number.

21314024320 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 21314024320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25515969120).

21314024320 is an abundant number, since it is smaller than the sum of its proper divisors (29717913920).

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

21314024320 is an equidigital number, since it uses as much as digits as its factorization.

21314024320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51063 (or 51051 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21314024320 its reverse (2342041312), we get a palindrome (23656065632).

The spelling of 21314024320 in words is "twenty-one billion, three hundred fourteen million, twenty-four thousand, three hundred twenty".