11431344140 has 24 divisors (see below), whose sum is σ = 24091264512. Its totient is φ = 4556263040.

The previous prime is 11431344097. The next prime is 11431344143. The reversal of 11431344140 is 4144313411.

It is a happy number.

It is a super-2 number, since 2×11431344140² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11431344143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011404 + ... + 1022643.

It is an arithmetic number, because the mean of its divisors is an integer number (1003802688).

Almost surely, 2^11431344140 is an apocalyptic number.

11431344140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11431344140 is an abundant number, since it is smaller than the sum of its proper divisors (12659920372).

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

11431344140 is a wasteful number, since it uses less digits than its factorization.

11431344140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034337 (or 2034335 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 11431344140 its reverse (4144313411), we get a palindrome (15575657551).

The spelling of 11431344140 in words is "eleven billion, four hundred thirty-one million, three hundred forty-four thousand, one hundred forty".