21302112320 has 28 divisors (see below), whose sum is σ = 50725655724. Its totient is φ = 8520844800.

The previous prime is 21302112311. The next prime is 21302112329. The reversal of 21302112320 is 2321120312.

It is an interprime number because it is at equal distance from previous prime (21302112311) and next prime (21302112329).

It can be written as a sum of positive squares in 2 ways, for example, as 8899280896 + 12402831424 = 94336^2 + 111368^2 .

It is not an unprimeable number, because it can be changed into a prime (21302112329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33284231 + ... + 33284870.

Almost surely, 2^21302112320 is an apocalyptic number.

21302112320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302112320 is an abundant number, since it is smaller than the sum of its proper divisors (29423543404).

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

21302112320 is an equidigital number, since it uses as much as digits as its factorization.

21302112320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66569118 (or 66569108 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21302112320 its reverse (2321120312), we get a palindrome (23623232632).

The spelling of 21302112320 in words is "twenty-one billion, three hundred two million, one hundred twelve thousand, three hundred twenty".