12134406540 has 48 divisors (see below), whose sum is σ = 35974949472. Its totient is φ = 3045497856.

The previous prime is 12134406511. The next prime is 12134406541. The reversal of 12134406540 is 4560443121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 12134406498 and 12134406507.

It is not an unprimeable number, because it can be changed into a prime (12134406541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5947219 + ... + 5949258.

It is an arithmetic number, because the mean of its divisors is an integer number (749478114).

Almost surely, 2^12134406540 is an apocalyptic number.

12134406540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12134406540 is an abundant number, since it is smaller than the sum of its proper divisors (23840542932).

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

12134406540 is a wasteful number, since it uses less digits than its factorization.

12134406540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11896506 (or 11896504 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 12134406540 its reverse (4560443121), we get a palindrome (16694849661).

The spelling of 12134406540 in words is "twelve billion, one hundred thirty-four million, four hundred six thousand, five hundred forty".