13042440520 has 16 divisors (see below), whose sum is σ = 29345491260. Its totient is φ = 5216976192.

The previous prime is 13042440431. The next prime is 13042440529. The reversal of 13042440520 is 2504424031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12625219044 + 417221476 = 112362^2 + 20426^2 .

It is not an unprimeable number, because it can be changed into a prime (13042440529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163030467 + ... + 163030546.

Almost surely, 2^13042440520 is an apocalyptic number.

13042440520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13042440520 is an abundant number, since it is smaller than the sum of its proper divisors (16303050740).

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

13042440520 is a wasteful number, since it uses less digits than its factorization.

13042440520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326061024 (or 326061020 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 13042440520 its reverse (2504424031), we get a palindrome (15546864551).

The spelling of 13042440520 in words is "thirteen billion, forty-two million, four hundred forty thousand, five hundred twenty".