21133033 has 8 divisors (see below), whose sum is σ = 21951360. Its totient is φ = 20330160.

The previous prime is 21133027. The next prime is 21133087. The reversal of 21133033 is 33033112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21133033 - 2¹³ = 21124841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21132998 and 21133016.

It is not an unprimeable number, because it can be changed into a prime (21133003) 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 7 ways as a sum of consecutive naturals, for example, 1038 + ... + 6583.

It is an arithmetic number, because the mean of its divisors is an integer number (2743920).

Almost surely, 2^21133033 is an apocalyptic number.

It is an amenable number.

21133033 is a deficient number, since it is larger than the sum of its proper divisors (818327).

21133033 is an equidigital number, since it uses as much as digits as its factorization.

21133033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7727.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 21133033 is about 4597.0678698492. The cubic root of 21133033 is about 276.4737758081.

Adding to 21133033 its reverse (33033112), we get a palindrome (54166145).

The spelling of 21133033 in words is "twenty-one million, one hundred thirty-three thousand, thirty-three".