12320320032 has 72 divisors (see below), whose sum is σ = 35259198156. Its totient is φ = 4080600576.

The previous prime is 12320320027. The next prime is 12320320037. The reversal of 12320320032 is 23002302321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12320320027) and next prime (12320320037).

It can be written as a sum of positive squares in 2 ways, for example, as 12169619856 + 150700176 = 110316^2 + 12276^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12320319987 and 12320320014.

It is not an unprimeable number, because it can be changed into a prime (12320320037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91023 + ... + 181454.

Almost surely, 2^12320320032 is an apocalyptic number.

12320320032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12320320032 is an abundant number, since it is smaller than the sum of its proper divisors (22938878124).

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

12320320032 is a wasteful number, since it uses less digits than its factorization.

12320320032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272650 (or 272639 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 12320320032 its reverse (23002302321), we get a palindrome (35322622353).

The spelling of 12320320032 in words is "twelve billion, three hundred twenty million, three hundred twenty thousand, thirty-two".