12020009 has 4 divisors (see below), whose sum is σ = 12033360. Its totient is φ = 12006660.

The previous prime is 12019993. The next prime is 12020051. The reversal of 12020009 is 90002021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90002021 = 31 ⋅2903291.

It is a cyclic number.

It is not a de Polignac number, because 12020009 - 2⁴ = 12019993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12019975 and 12020002.

It is not an unprimeable number, because it can be changed into a prime (12020209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5219 + ... + 7160.

It is an arithmetic number, because the mean of its divisors is an integer number (3008340).

Almost surely, 2^12020009 is an apocalyptic number.

It is an amenable number.

12020009 is a deficient number, since it is larger than the sum of its proper divisors (13351).

12020009 is an equidigital number, since it uses as much as digits as its factorization.

12020009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13350.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 12020009 is about 3466.9884626286. The cubic root of 12020009 is about 229.0700255582.

The spelling of 12020009 in words is "twelve million, twenty thousand, nine".