12431012240 has 20 divisors (see below), whose sum is σ = 28902103644. Its totient is φ = 4972404864.

The previous prime is 12431012207. The next prime is 12431012263. The reversal of 12431012240 is 4221013421.

It can be written as a sum of positive squares in 2 ways, for example, as 8002375936 + 4428636304 = 89456^2 + 66548^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×12431012240² (a number of 21 digits) contains 22 as substring.

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

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, 77693747 + ... + 77693906.

Almost surely, 2^12431012240 is an apocalyptic number.

12431012240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12431012240 is an abundant number, since it is smaller than the sum of its proper divisors (16471091404).

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

12431012240 is a wasteful number, since it uses less digits than its factorization.

12431012240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155387666 (or 155387660 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12431012240 its reverse (4221013421), we get a palindrome (16652025661).

The spelling of 12431012240 in words is "twelve billion, four hundred thirty-one million, twelve thousand, two hundred forty".