20797669759 has 2 divisors, whose sum is σ = 20797669760. Its totient is φ = 20797669758.

The previous prime is 20797669751. The next prime is 20797669801. The reversal of 20797669759 is 95796679702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20797669759 - 2³ = 20797669751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20797669694 and 20797669703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20797669751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10398834879 + 10398834880.

It is an arithmetic number, because the mean of its divisors is an integer number (10398834880).

Almost surely, 2^20797669759 is an apocalyptic number.

20797669759 is a deficient number, since it is larger than the sum of its proper divisors (1).

20797669759 is an equidigital number, since it uses as much as digits as its factorization.

20797669759 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90016920, while the sum is 67.

The spelling of 20797669759 in words is "twenty billion, seven hundred ninety-seven million, six hundred sixty-nine thousand, seven hundred fifty-nine".