13243420240 has 160 divisors (see below), whose sum is σ = 34436295936. Its totient is φ = 4710604800.

The previous prime is 13243420219. The next prime is 13243420259. The reversal of 13243420240 is 4202434231.

It is a happy number.

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, 2593690 + ... + 2598790.

Almost surely, 2^13243420240 is an apocalyptic number.

13243420240 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 13243420240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17218147968).

13243420240 is an abundant number, since it is smaller than the sum of its proper divisors (21192875696).

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

13243420240 is a wasteful number, since it uses less digits than its factorization.

13243420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237 (or 5231 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 13243420240 its reverse (4202434231), we get a palindrome (17445854471).

The spelling of 13243420240 in words is "thirteen billion, two hundred forty-three million, four hundred twenty thousand, two hundred forty".