19858542123163 has 2 divisors, whose sum is σ = 19858542123164. Its totient is φ = 19858542123162.

The previous prime is 19858542123109. The next prime is 19858542123227. The reversal of 19858542123163 is 36132124585891.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19858542123163 is a prime.

It is a super-2 number, since 2×19858542123163² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19858542123098 and 19858542123107.

It is not a weakly prime, because it can be changed into another prime (19858542123103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9929271061581 + 9929271061582.

It is an arithmetic number, because the mean of its divisors is an integer number (9929271061582).

Almost surely, 2^{19858542123163} is an apocalyptic number.

19858542123163 is a deficient number, since it is larger than the sum of its proper divisors (1).

19858542123163 is an equidigital number, since it uses as much as digits as its factorization.

19858542123163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12441600, while the sum is 58.

The spelling of 19858542123163 in words is "nineteen trillion, eight hundred fifty-eight billion, five hundred forty-two million, one hundred twenty-three thousand, one hundred sixty-three".