21003233263 has 2 divisors, whose sum is σ = 21003233264. Its totient is φ = 21003233262.

The previous prime is 21003233257. The next prime is 21003233333. The reversal of 21003233263 is 36233230012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21003233263 - 2¹³ = 21003225071 is a prime.

It is a super-2 number, since 2×21003233263² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21003233233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501616631 + 10501616632.

It is an arithmetic number, because the mean of its divisors is an integer number (10501616632).

Almost surely, 2^21003233263 is an apocalyptic number.

21003233263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003233263 is an equidigital number, since it uses as much as digits as its factorization.

21003233263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21003233263 its reverse (36233230012), we get a palindrome (57236463275).

The spelling of 21003233263 in words is "twenty-one billion, three million, two hundred thirty-three thousand, two hundred sixty-three".