21694296263 has 2 divisors, whose sum is σ = 21694296264. Its totient is φ = 21694296262.

The previous prime is 21694296149. The next prime is 21694296287. The reversal of 21694296263 is 36269249612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21694296263 - 2¹⁰ = 21694295239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21694296563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10847148131 + 10847148132.

It is an arithmetic number, because the mean of its divisors is an integer number (10847148132).

Almost surely, 2^21694296263 is an apocalyptic number.

21694296263 is a deficient number, since it is larger than the sum of its proper divisors (1).

21694296263 is an equidigital number, since it uses as much as digits as its factorization.

21694296263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1679616, while the sum is 50.

The spelling of 21694296263 in words is "twenty-one billion, six hundred ninety-four million, two hundred ninety-six thousand, two hundred sixty-three".