19170123481 has 2 divisors, whose sum is σ = 19170123482. Its totient is φ = 19170123480.

The previous prime is 19170123437. The next prime is 19170123499. The reversal of 19170123481 is 18432107191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18739145881 + 430977600 = 136891^2 + 20760^2 .

It is a cyclic number.

It is not a de Polignac number, because 19170123481 - 2²⁹ = 18633252569 is a prime.

It is a super-2 number, since 2×19170123481² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19170123481.

It is not a weakly prime, because it can be changed into another prime (19170523481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9585061740 + 9585061741.

It is an arithmetic number, because the mean of its divisors is an integer number (9585061741).

Almost surely, 2^19170123481 is an apocalyptic number.

It is an amenable number.

19170123481 is a deficient number, since it is larger than the sum of its proper divisors (1).

19170123481 is an equidigital number, since it uses as much as digits as its factorization.

19170123481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 19170123481 in words is "nineteen billion, one hundred seventy million, one hundred twenty-three thousand, four hundred eighty-one".