21230333 has 8 divisors (see below), whose sum is σ = 21845376. Its totient is φ = 20620000.

The previous prime is 21230329. The next prime is 21230359. The reversal of 21230333 is 33303212.

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 21230333 - 2² = 21230329 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 (21230303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9260 + ... + 11322.

It is an arithmetic number, because the mean of its divisors is an integer number (2730672).

Almost surely, 2^21230333 is an apocalyptic number.

It is an amenable number.

21230333 is a deficient number, since it is larger than the sum of its proper divisors (615043).

21230333 is a wasteful number, since it uses less digits than its factorization.

21230333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2355.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 21230333 is about 4607.6385491920. The cubic root of 21230333 is about 276.8974366910.

Adding to 21230333 its reverse (33303212), we get a palindrome (54533545).

The spelling of 21230333 in words is "twenty-one million, two hundred thirty thousand, three hundred thirty-three".