11431324240 has 80 divisors (see below), whose sum is σ = 30406268160. Its totient is φ = 3915233280.

The previous prime is 11431324237. The next prime is 11431324241. The reversal of 11431324240 is 4242313411.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431324241) 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, 554925 + ... + 575155.

It is an arithmetic number, because the mean of its divisors is an integer number (380078352).

Almost surely, 2^11431324240 is an apocalyptic number.

11431324240 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 11431324240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15203134080).

11431324240 is an abundant number, since it is smaller than the sum of its proper divisors (18974943920).

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

11431324240 is a wasteful number, since it uses less digits than its factorization.

11431324240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21260 (or 21254 counting only the distinct ones).

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

Adding to 11431324240 its reverse (4242313411), we get a palindrome (15673637651).

The spelling of 11431324240 in words is "eleven billion, four hundred thirty-one million, three hundred twenty-four thousand, two hundred forty".