12031240340 has 48 divisors (see below), whose sum is σ = 30573510912. Its totient is φ = 3882349056.

The previous prime is 12031240327. The next prime is 12031240381. The reversal of 12031240340 is 4304213021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2525192 + ... + 2529951.

It is an arithmetic number, because the mean of its divisors is an integer number (636948144).

Almost surely, 2^12031240340 is an apocalyptic number.

12031240340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12031240340 is an abundant number, since it is smaller than the sum of its proper divisors (18542270572).

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

12031240340 is a wasteful number, since it uses less digits than its factorization.

12031240340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055176 (or 5055174 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12031240340 its reverse (4304213021), we get a palindrome (16335453361).

The spelling of 12031240340 in words is "twelve billion, thirty-one million, two hundred forty thousand, three hundred forty".