13531144020 has 48 divisors (see below), whose sum is σ = 37961723520. Its totient is φ = 3601207936.

The previous prime is 13531144019. The next prime is 13531144043. The reversal of 13531144020 is 2044113531.

It is a happy number.

13531144020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190992 + ... + 252071.

It is an arithmetic number, because the mean of its divisors is an integer number (790869240).

Almost surely, 2^13531144020 is an apocalyptic number.

13531144020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531144020 is an abundant number, since it is smaller than the sum of its proper divisors (24430579500).

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

13531144020 is a wasteful number, since it uses less digits than its factorization.

13531144020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443584 (or 443582 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 13531144020 its reverse (2044113531), we get a palindrome (15575257551).

The spelling of 13531144020 in words is "thirteen billion, five hundred thirty-one million, one hundred forty-four thousand, twenty".