19840996169 has 2 divisors, whose sum is σ = 19840996170. Its totient is φ = 19840996168.

The previous prime is 19840996163. The next prime is 19840996187. The reversal of 19840996169 is 96169904891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17197699600 + 2643296569 = 131140^2 + 51413^2 .

It is a cyclic number.

It is not a de Polignac number, because 19840996169 - 2²⁰ = 19839947593 is a prime.

It is a super-2 number, since 2×19840996169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19840996163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9920498084 + 9920498085.

It is an arithmetic number, because the mean of its divisors is an integer number (9920498085).

Almost surely, 2^19840996169 is an apocalyptic number.

It is an amenable number.

19840996169 is a deficient number, since it is larger than the sum of its proper divisors (1).

19840996169 is an equidigital number, since it uses as much as digits as its factorization.

19840996169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7558272, while the sum is 62.

The spelling of 19840996169 in words is "nineteen billion, eight hundred forty million, nine hundred ninety-six thousand, one hundred sixty-nine".