18965076117557 has 2 divisors, whose sum is σ = 18965076117558. Its totient is φ = 18965076117556.

The previous prime is 18965076117541. The next prime is 18965076117577. The reversal of 18965076117557 is 75571167056981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18723915568996 + 241160548561 = 4327114^2 + 491081^2 .

It is a cyclic number.

It is not a de Polignac number, because 18965076117557 - 2⁴ = 18965076117541 is a prime.

It is a super-2 number, since 2×18965076117557² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18965076117517) 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, 9482538058778 + 9482538058779.

It is an arithmetic number, because the mean of its divisors is an integer number (9482538058779).

Almost surely, 2^{18965076117557} is an apocalyptic number.

It is an amenable number.

18965076117557 is a deficient number, since it is larger than the sum of its proper divisors (1).

18965076117557 is an equidigital number, since it uses as much as digits as its factorization.

18965076117557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 111132000, while the sum is 68.

The spelling of 18965076117557 in words is "eighteen trillion, nine hundred sixty-five billion, seventy-six million, one hundred seventeen thousand, five hundred fifty-seven".