1018191910193 has 2 divisors, whose sum is σ = 1018191910194. Its totient is φ = 1018191910192.

The previous prime is 1018191910181. The next prime is 1018191910231. The reversal of 1018191910193 is 3910191918101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1013390528929 + 4801381264 = 1006673^2 + 69292^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018191910193 - 2¹⁸ = 1018191648049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1018191910163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509095955096 + 509095955097.

It is an arithmetic number, because the mean of its divisors is an integer number (509095955097).

Almost surely, 2^{1018191910193} is an apocalyptic number.

It is an amenable number.

1018191910193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018191910193 is an equidigital number, since it uses as much as digits as its factorization.

1018191910193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 44.

The spelling of 1018191910193 in words is "one trillion, eighteen billion, one hundred ninety-one million, nine hundred ten thousand, one hundred ninety-three".