19896698869 has 2 divisors, whose sum is σ = 19896698870. Its totient is φ = 19896698868.

The previous prime is 19896698837. The next prime is 19896698911. The reversal of 19896698869 is 96889669891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19248232644 + 648466225 = 138738^2 + 25465^2 .

It is a cyclic number.

It is not a de Polignac number, because 19896698869 - 2⁵ = 19896698837 is a prime.

It is a super-2 number, since 2×19896698869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19896698819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9948349434 + 9948349435.

It is an arithmetic number, because the mean of its divisors is an integer number (9948349435).

Almost surely, 2^19896698869 is an apocalyptic number.

It is an amenable number.

19896698869 is a deficient number, since it is larger than the sum of its proper divisors (1).

19896698869 is an equidigital number, since it uses as much as digits as its factorization.

19896698869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725594112, while the sum is 79.

The spelling of 19896698869 in words is "nineteen billion, eight hundred ninety-six million, six hundred ninety-eight thousand, eight hundred sixty-nine".