13140442240 has 128 divisors (see below), whose sum is σ = 32693284800. Its totient is φ = 5046300672.

The previous prime is 13140442229. The next prime is 13140442241. The reversal of 13140442240 is 4224404131.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (13140442241) 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, 1619634 + ... + 1627726.

Almost surely, 2^13140442240 is an apocalyptic number.

13140442240 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 13140442240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16346642400).

13140442240 is an abundant number, since it is smaller than the sum of its proper divisors (19552842560).

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

13140442240 is an equidigital number, since it uses as much as digits as its factorization.

13140442240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8214 (or 8202 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 13140442240 its reverse (4224404131), we get a palindrome (17364846371).

The spelling of 13140442240 in words is "thirteen billion, one hundred forty million, four hundred forty-two thousand, two hundred forty".