12720320236 has 24 divisors (see below), whose sum is σ = 24125620400. Its totient is φ = 5833518912.

The previous prime is 12720320213. The next prime is 12720320237. The reversal of 12720320236 is 63202302721.

It is not an unprimeable number, because it can be changed into a prime (12720320237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770886 + ... + 787213.

Almost surely, 2^12720320236 is an apocalyptic number.

It is an amenable number.

12720320236 is a deficient number, since it is larger than the sum of its proper divisors (11405300164).

12720320236 is a wasteful number, since it uses less digits than its factorization.

12720320236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558273 (or 1558271 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

Adding to 12720320236 its reverse (63202302721), we get a palindrome (75922622957).

The spelling of 12720320236 in words is "twelve billion, seven hundred twenty million, three hundred twenty thousand, two hundred thirty-six".