19965217033189 has 2 divisors, whose sum is σ = 19965217033190. Its totient is φ = 19965217033188.

The previous prime is 19965217033133. The next prime is 19965217033217. The reversal of 19965217033189 is 98133071256991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11164252277025 + 8800964756164 = 3341295^2 + 2966642^2 .

It is a cyclic number.

It is not a de Polignac number, because 19965217033189 - 2¹³ = 19965217024997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19965217033189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19965217033589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9982608516594 + 9982608516595.

It is an arithmetic number, because the mean of its divisors is an integer number (9982608516595).

Almost surely, 2^{19965217033189} is an apocalyptic number.

It is an amenable number.

19965217033189 is a deficient number, since it is larger than the sum of its proper divisors (1).

19965217033189 is an equidigital number, since it uses as much as digits as its factorization.

19965217033189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22044960, while the sum is 64.

The spelling of 19965217033189 in words is "nineteen trillion, nine hundred sixty-five billion, two hundred seventeen million, thirty-three thousand, one hundred eighty-nine".