21234333 has 4 divisors (see below), whose sum is σ = 28312448. Its totient is φ = 14156220.

The previous prime is 21234307. The next prime is 21234347. The reversal of 21234333 is 33343212.

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 21234333 - 2¹³ = 21226141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21234373) 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, 3539053 + ... + 3539058.

It is an arithmetic number, because the mean of its divisors is an integer number (7078112).

Almost surely, 2^21234333 is an apocalyptic number.

It is an amenable number.

21234333 is a deficient number, since it is larger than the sum of its proper divisors (7078115).

21234333 is an equidigital number, since it uses as much as digits as its factorization.

21234333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078114.

The product of its digits is 1296, while the sum is 21.

The square root of 21234333 is about 4608.0725905741. The cubic root of 21234333 is about 276.9148256504.

Adding to 21234333 its reverse (33343212), we get a palindrome (54577545).

The spelling of 21234333 in words is "twenty-one million, two hundred thirty-four thousand, three hundred thirty-three".