12397756420 has 24 divisors (see below), whose sum is σ = 29754615744. Its totient is φ = 4250659296.

The previous prime is 12397756403. The next prime is 12397756421. The reversal of 12397756420 is 2465779321.

It is not an unprimeable number, because it can be changed into a prime (12397756421) 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, 44277562 + ... + 44277841.

It is an arithmetic number, because the mean of its divisors is an integer number (1239775656).

Almost surely, 2^12397756420 is an apocalyptic number.

12397756420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12397756420 is an abundant number, since it is smaller than the sum of its proper divisors (17356859324).

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

12397756420 is a wasteful number, since it uses less digits than its factorization.

12397756420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88555419 (or 88555417 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 12397756420 in words is "twelve billion, three hundred ninety-seven million, seven hundred fifty-six thousand, four hundred twenty".