21313535263 has 2 divisors, whose sum is σ = 21313535264. Its totient is φ = 21313535262.

The previous prime is 21313535249. The next prime is 21313535267. The reversal of 21313535263 is 36253531312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21313535263 - 2²¹ = 21311438111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313535267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656767631 + 10656767632.

It is an arithmetic number, because the mean of its divisors is an integer number (10656767632).

Almost surely, 2^21313535263 is an apocalyptic number.

21313535263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313535263 is an equidigital number, since it uses as much as digits as its factorization.

21313535263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48600, while the sum is 34.

The spelling of 21313535263 in words is "twenty-one billion, three hundred thirteen million, five hundred thirty-five thousand, two hundred sixty-three".