19361698669 has 2 divisors, whose sum is σ = 19361698670. Its totient is φ = 19361698668.

The previous prime is 19361698639. The next prime is 19361698721. The reversal of 19361698669 is 96689616391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12507514569 + 6854184100 = 111837^2 + 82790^2 .

It is a cyclic number.

It is not a de Polignac number, because 19361698669 - 2⁷ = 19361698541 is a prime.

It is a super-2 number, since 2×19361698669² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19361698669.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19361698619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9680849334 + 9680849335.

It is an arithmetic number, because the mean of its divisors is an integer number (9680849335).

Almost surely, 2^19361698669 is an apocalyptic number.

It is an amenable number.

19361698669 is a deficient number, since it is larger than the sum of its proper divisors (1).

19361698669 is an equidigital number, since it uses as much as digits as its factorization.

19361698669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22674816, while the sum is 64.

The spelling of 19361698669 in words is "nineteen billion, three hundred sixty-one million, six hundred ninety-eight thousand, six hundred sixty-nine".