12013533 has 24 divisors (see below), whose sum is σ = 20319936. Its totient is φ = 6696000.

The previous prime is 12013531. The next prime is 12013541. The reversal of 12013533 is 33531021.

12013533 is a `hidden beast` number, since 120 + 13 + 533 = 666.

It is not a de Polignac number, because 12013533 - 2¹ = 12013531 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013531) 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 23 ways as a sum of consecutive naturals, for example, 258 + ... + 4908.

It is an arithmetic number, because the mean of its divisors is an integer number (846664).

Almost surely, 2^12013533 is an apocalyptic number.

It is an amenable number.

12013533 is a deficient number, since it is larger than the sum of its proper divisors (8306403).

12013533 is a wasteful number, since it uses less digits than its factorization.

12013533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705 (or 4702 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 12013533 is about 3466.0543850321. The cubic root of 12013533 is about 229.0288796107.

Adding to 12013533 its reverse (33531021), we get a palindrome (45544554).

The spelling of 12013533 in words is "twelve million, thirteen thousand, five hundred thirty-three".