33030021 has 4 divisors (see below), whose sum is σ = 44040032. Its totient is φ = 22020012.

The previous prime is 33030007. The next prime is 33030073. The reversal of 33030021 is 12003033.

It is a happy number.

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.

It is not a de Polignac number, because 33030021 - 2¹⁰ = 33028997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33029979 and 33030006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33030121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5505001 + ... + 5505006.

It is an arithmetic number, because the mean of its divisors is an integer number (11010008).

Almost surely, 2^33030021 is an apocalyptic number.

It is an amenable number.

33030021 is a deficient number, since it is larger than the sum of its proper divisors (11010011).

33030021 is a wasteful number, since it uses less digits than its factorization.

33030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11010010.

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 33030021 is about 5747.1750451852. The cubic root of 33030021 is about 320.8506695679.

Adding to 33030021 its reverse (12003033), we get a palindrome (45033054).

The spelling of 33030021 in words is "thirty-three million, thirty thousand, twenty-one".