19363628209 has 2 divisors, whose sum is σ = 19363628210. Its totient is φ = 19363628208.

The previous prime is 19363628159. The next prime is 19363628227. The reversal of 19363628209 is 90282636391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18578507809 + 785120400 = 136303^2 + 28020^2 .

It is a cyclic number.

It is not a de Polignac number, because 19363628209 - 2¹⁷ = 19363497137 is a prime.

It is not a weakly prime, because it can be changed into another prime (19363628509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9681814104 + 9681814105.

It is an arithmetic number, because the mean of its divisors is an integer number (9681814105).

Almost surely, 2^19363628209 is an apocalyptic number.

It is an amenable number.

19363628209 is a deficient number, since it is larger than the sum of its proper divisors (1).

19363628209 is an equidigital number, since it uses as much as digits as its factorization.

19363628209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 49.

The spelling of 19363628209 in words is "nineteen billion, three hundred sixty-three million, six hundred twenty-eight thousand, two hundred nine".