21330003263 has 2 divisors, whose sum is σ = 21330003264. Its totient is φ = 21330003262.

The previous prime is 21330003257. The next prime is 21330003271. The reversal of 21330003263 is 36230003312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21330003263 - 2⁶ = 21330003199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21330006263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665001631 + 10665001632.

It is an arithmetic number, because the mean of its divisors is an integer number (10665001632).

Almost surely, 2^21330003263 is an apocalyptic number.

21330003263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330003263 is an equidigital number, since it uses as much as digits as its factorization.

21330003263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21330003263 its reverse (36230003312), we get a palindrome (57560006575).

The spelling of 21330003263 in words is "twenty-one billion, three hundred thirty million, three thousand, two hundred sixty-three".