19948809355199 has 2 divisors, whose sum is σ = 19948809355200. Its totient is φ = 19948809355198.

The previous prime is 19948809355157. The next prime is 19948809355283. The reversal of 19948809355199 is 99155390884991.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19948809355199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19948809355799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9974404677599 + 9974404677600.

It is an arithmetic number, because the mean of its divisors is an integer number (9974404677600).

Almost surely, 2^{19948809355199} is an apocalyptic number.

19948809355199 is a deficient number, since it is larger than the sum of its proper divisors (1).

19948809355199 is an equidigital number, since it uses as much as digits as its factorization.

19948809355199 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1133740800, while the sum is 80.

The spelling of 19948809355199 in words is "nineteen trillion, nine hundred forty-eight billion, eight hundred nine million, three hundred fifty-five thousand, one hundred ninety-nine".