21434333 has 4 divisors (see below), whose sum is σ = 21728028. Its totient is φ = 21140640.

The previous prime is 21434327. The next prime is 21434341. The reversal of 21434333 is 33343412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16176484 + 5257849 = 4022^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 21434333 - 2⁶ = 21434269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21434299 and 21434308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146738 + ... + 146883.

It is an arithmetic number, because the mean of its divisors is an integer number (5432007).

Almost surely, 2^21434333 is an apocalyptic number.

It is an amenable number.

21434333 is a deficient number, since it is larger than the sum of its proper divisors (293695).

21434333 is an equidigital number, since it uses as much as digits as its factorization.

21434333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293694.

The product of its digits is 2592, while the sum is 23.

The square root of 21434333 is about 4629.7227778777. The cubic root of 21434333 is about 277.7815036952.

Adding to 21434333 its reverse (33343412), we get a palindrome (54777745).

The spelling of 21434333 in words is "twenty-one million, four hundred thirty-four thousand, three hundred thirty-three".