21330003233 has 8 divisors (see below), whose sum is σ = 26593250880. Its totient is φ = 16620781680.

The previous prime is 21330003217. The next prime is 21330003257. The reversal of 21330003233 is 33230003312.

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 21330003233 - 2⁴ = 21330003217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21330003263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138506438 + ... + 138506591.

It is an arithmetic number, because the mean of its divisors is an integer number (3324156360).

Almost surely, 2^21330003233 is an apocalyptic number.

It is an amenable number.

21330003233 is a deficient number, since it is larger than the sum of its proper divisors (5263247647).

21330003233 is a wasteful number, since it uses less digits than its factorization.

21330003233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277013047.

The product of its (nonzero) digits is 972, while the sum is 20.

Adding to 21330003233 its reverse (33230003312), we get a palindrome (54560006545).

The spelling of 21330003233 in words is "twenty-one billion, three hundred thirty million, three thousand, two hundred thirty-three".