13240133440 has 112 divisors (see below), whose sum is σ = 32652785088. Its totient is φ = 5110124544.

The previous prime is 13240133429. The next prime is 13240133479. The reversal of 13240133440 is 4433104231.

It is a super-2 number, since 2×13240133440² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1136284 + ... + 1147876.

It is an arithmetic number, because the mean of its divisors is an integer number (291542724).

Almost surely, 2^13240133440 is an apocalyptic number.

13240133440 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 13240133440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16326392544).

13240133440 is an abundant number, since it is smaller than the sum of its proper divisors (19412651648).

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

13240133440 is a wasteful number, since it uses less digits than its factorization.

13240133440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11736 (or 11726 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 13240133440 its reverse (4433104231), we get a palindrome (17673237671).

The spelling of 13240133440 in words is "thirteen billion, two hundred forty million, one hundred thirty-three thousand, four hundred forty".