19926796369 has 2 divisors, whose sum is σ = 19926796370. Its totient is φ = 19926796368.

The previous prime is 19926796277. The next prime is 19926796399. The reversal of 19926796369 is 96369762991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14716843969 + 5209952400 = 121313^2 + 72180^2 .

It is a cyclic number.

It is not a de Polignac number, because 19926796369 - 2²⁵ = 19893241937 is a prime.

It is a super-2 number, since 2×19926796369² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19926796399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9963398184 + 9963398185.

It is an arithmetic number, because the mean of its divisors is an integer number (9963398185).

Almost surely, 2^19926796369 is an apocalyptic number.

It is an amenable number.

19926796369 is a deficient number, since it is larger than the sum of its proper divisors (1).

19926796369 is an equidigital number, since it uses as much as digits as its factorization.

19926796369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59521392, while the sum is 67.

The spelling of 19926796369 in words is "nineteen billion, nine hundred twenty-six million, seven hundred ninety-six thousand, three hundred sixty-nine".