19917983741063 has 2 divisors, whose sum is σ = 19917983741064. Its totient is φ = 19917983741062.

The previous prime is 19917983740973. The next prime is 19917983741083. The reversal of 19917983741063 is 36014738971991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19917983741063 - 2¹² = 19917983736967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19917983740984 and 19917983741002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19917983741083) 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, 9958991870531 + 9958991870532.

It is an arithmetic number, because the mean of its divisors is an integer number (9958991870532).

Almost surely, 2^{19917983741063} is an apocalyptic number.

19917983741063 is a deficient number, since it is larger than the sum of its proper divisors (1).

19917983741063 is an equidigital number, since it uses as much as digits as its factorization.

19917983741063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61725888, while the sum is 68.

The spelling of 19917983741063 in words is "nineteen trillion, nine hundred seventeen billion, nine hundred eighty-three million, seven hundred forty-one thousand, sixty-three".