21496606193 has 2 divisors, whose sum is σ = 21496606194. Its totient is φ = 21496606192.

The previous prime is 21496606169. The next prime is 21496606211. The reversal of 21496606193 is 39160669412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21496544689 + 61504 = 146617^2 + 248^2 .

It is a cyclic number.

It is not a de Polignac number, because 21496606193 - 2¹⁸ = 21496344049 is a prime.

It is not a weakly prime, because it can be changed into another prime (21496606123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10748303096 + 10748303097.

It is an arithmetic number, because the mean of its divisors is an integer number (10748303097).

Almost surely, 2^21496606193 is an apocalyptic number.

It is an amenable number.

21496606193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21496606193 is an equidigital number, since it uses as much as digits as its factorization.

21496606193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 21496606193 in words is "twenty-one billion, four hundred ninety-six million, six hundred six thousand, one hundred ninety-three".