21692794769 has 2 divisors, whose sum is σ = 21692794770. Its totient is φ = 21692794768.

The previous prime is 21692794657. The next prime is 21692794811. The reversal of 21692794769 is 96749729612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18655462225 + 3037332544 = 136585^2 + 55112^2 .

It is a cyclic number.

It is not a de Polignac number, because 21692794769 - 2²⁴ = 21676017553 is a prime.

It is a super-2 number, since 2×21692794769² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21692794169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10846397384 + 10846397385.

It is an arithmetic number, because the mean of its divisors is an integer number (10846397385).

Almost surely, 2^21692794769 is an apocalyptic number.

It is an amenable number.

21692794769 is a deficient number, since it is larger than the sum of its proper divisors (1).

21692794769 is an equidigital number, since it uses as much as digits as its factorization.

21692794769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 62.

The spelling of 21692794769 in words is "twenty-one billion, six hundred ninety-two million, seven hundred ninety-four thousand, seven hundred sixty-nine".