21116333 has 8 divisors (see below), whose sum is σ = 24161280. Its totient is φ = 18078480.

The previous prime is 21116317. The next prime is 21116351. The reversal of 21116333 is 33361112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21116333 - 2⁴ = 21116317 is a prime.

It is a Duffinian number.

21116333 is a modest number, since divided by 6333 gives 2111 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21116393) 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, 8948 + ... + 11058.

It is an arithmetic number, because the mean of its divisors is an integer number (3020160).

Almost surely, 2^21116333 is an apocalyptic number.

It is an amenable number.

21116333 is a deficient number, since it is larger than the sum of its proper divisors (3044947).

21116333 is a wasteful number, since it uses less digits than its factorization.

21116333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547.

The product of its digits is 324, while the sum is 20.

The square root of 21116333 is about 4595.2511356834. The cubic root of 21116333 is about 276.4009304702.

Adding to 21116333 its reverse (33361112), we get a palindrome (54477445).

The spelling of 21116333 in words is "twenty-one million, one hundred sixteen thousand, three hundred thirty-three".