12391533340 has 12 divisors (see below), whose sum is σ = 26022220056. Its totient is φ = 4956613328.

The previous prime is 12391533283. The next prime is 12391533379. The reversal of 12391533340 is 4333519321.

It is a junction number, because it is equal to n+sod(n) for n = 12391533296 and 12391533305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309788314 + ... + 309788353.

It is an arithmetic number, because the mean of its divisors is an integer number (2168518338).

Almost surely, 2^12391533340 is an apocalyptic number.

12391533340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12391533340 is an abundant number, since it is smaller than the sum of its proper divisors (13630686716).

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

12391533340 is a wasteful number, since it uses less digits than its factorization.

12391533340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619576676 (or 619576674 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 34.

The spelling of 12391533340 in words is "twelve billion, three hundred ninety-one million, five hundred thirty-three thousand, three hundred forty".