21303110263 has 2 divisors, whose sum is σ = 21303110264. Its totient is φ = 21303110262.

The previous prime is 21303110237. The next prime is 21303110291. The reversal of 21303110263 is 36201130312.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21303110263 is a prime.

It is a super-4 number, since 4×21303110263⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21303110663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651555131 + 10651555132.

It is an arithmetic number, because the mean of its divisors is an integer number (10651555132).

Almost surely, 2^21303110263 is an apocalyptic number.

21303110263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303110263 is an equidigital number, since it uses as much as digits as its factorization.

21303110263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21303110263 its reverse (36201130312), we get a palindrome (57504240575).

The spelling of 21303110263 in words is "twenty-one billion, three hundred three million, one hundred ten thousand, two hundred sixty-three".