12431421340 has 96 divisors (see below), whose sum is σ = 29410367616. Its totient is φ = 4379443200.

The previous prime is 12431421337. The next prime is 12431421361. The reversal of 12431421340 is 4312413421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2586940 + ... + 2591740.

It is an arithmetic number, because the mean of its divisors is an integer number (306357996).

Almost surely, 2^12431421340 is an apocalyptic number.

12431421340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12431421340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14705183808).

12431421340 is an abundant number, since it is smaller than the sum of its proper divisors (16978946276).

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

12431421340 is a wasteful number, since it uses less digits than its factorization.

12431421340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5279 (or 5277 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 12431421340 its reverse (4312413421), we get a palindrome (16743834761).

The spelling of 12431421340 in words is "twelve billion, four hundred thirty-one million, four hundred twenty-one thousand, three hundred forty".