11443532013 has 20 divisors (see below), whose sum is σ = 17556681340. Its totient is φ = 7422829632.

The previous prime is 11443532003. The next prime is 11443532027. The reversal of 11443532013 is 31023534411.

It is a happy number.

11443532013 is a `hidden beast` number, since 11 + 443 + 5 + 3 + 201 + 3 = 666.

11443532013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8850481929 + 2593050084 = 94077^2 + 50922^2 .

It is not a de Polignac number, because 11443532013 - 2⁹ = 11443531501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11443532003) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 1906168 + ... + 1912161.

It is an arithmetic number, because the mean of its divisors is an integer number (877834067).

Almost surely, 2^11443532013 is an apocalyptic number.

It is an amenable number.

11443532013 is a deficient number, since it is larger than the sum of its proper divisors (6113149327).

11443532013 is an equidigital number, since it uses as much as digits as its factorization.

11443532013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3818378 (or 3818369 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The spelling of 11443532013 in words is "eleven billion, four hundred forty-three million, five hundred thirty-two thousand, thirteen".