20796669749 has 2 divisors, whose sum is σ = 20796669750. Its totient is φ = 20796669748.

The previous prime is 20796669701. The next prime is 20796669767. The reversal of 20796669749 is 94796669702.

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., 20389840849 + 406828900 = 142793^2 + 20170^2 .

It is a cyclic number.

It is not a de Polignac number, because 20796669749 - 2⁸ = 20796669493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20796669779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10398334874 + 10398334875.

It is an arithmetic number, because the mean of its divisors is an integer number (10398334875).

Almost surely, 2^20796669749 is an apocalyptic number.

It is an amenable number.

20796669749 is a deficient number, since it is larger than the sum of its proper divisors (1).

20796669749 is an equidigital number, since it uses as much as digits as its factorization.

20796669749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61725888, while the sum is 65.

The spelling of 20796669749 in words is "twenty billion, seven hundred ninety-six million, six hundred sixty-nine thousand, seven hundred forty-nine".