21322033 has 4 divisors (see below), whose sum is σ = 21370608. Its totient is φ = 21273460.

The previous prime is 21322031. The next prime is 21322043. The reversal of 21322033 is 33022312.

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 a cyclic number.

It is not a de Polignac number, because 21322033 - 2¹ = 21322031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21321998 and 21322016.

It is not an unprimeable number, because it can be changed into a prime (21322031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23623 + ... + 24508.

It is an arithmetic number, because the mean of its divisors is an integer number (5342652).

Almost surely, 2^21322033 is an apocalyptic number.

It is an amenable number.

21322033 is a deficient number, since it is larger than the sum of its proper divisors (48575).

21322033 is an equidigital number, since it uses as much as digits as its factorization.

21322033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48574.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 21322033 is about 4617.5786945108. The cubic root of 21322033 is about 277.2955310067.

Adding to 21322033 its reverse (33022312), we get a palindrome (54344345).

The spelling of 21322033 in words is "twenty-one million, three hundred twenty-two thousand, thirty-three".