21332133 has 32 divisors (see below), whose sum is σ = 32678400. Its totient is φ = 13747968.

The previous prime is 21332119. The next prime is 21332141. The reversal of 21332133 is 33123312.

It is not a de Polignac number, because 21332133 - 2⁹ = 21331621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155641 + ... + 155777.

It is an arithmetic number, because the mean of its divisors is an integer number (1021200).

Almost surely, 2^21332133 is an apocalyptic number.

It is an amenable number.

21332133 is a deficient number, since it is larger than the sum of its proper divisors (11346267).

21332133 is a wasteful number, since it uses less digits than its factorization.

21332133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 292 counting only the distinct ones).

The product of its digits is 324, while the sum is 18.

The square root of 21332133 is about 4618.6722117942. The cubic root of 21332133 is about 277.3393079886.

Adding to 21332133 its reverse (33123312), we get a palindrome (54455445).

The spelling of 21332133 in words is "twenty-one million, three hundred thirty-two thousand, one hundred thirty-three".