18631142861063 has 2 divisors, whose sum is σ = 18631142861064. Its totient is φ = 18631142861062.

The previous prime is 18631142861057. The next prime is 18631142861147. The reversal of 18631142861063 is 36016824113681.

It is a weak prime.

It is an emirp because it is prime and its reverse (36016824113681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18631142861063 - 2¹⁶ = 18631142795527 is a prime.

It is a super-4 number, since 4×18631142861063⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18631142861263) 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, 9315571430531 + 9315571430532.

It is an arithmetic number, because the mean of its divisors is an integer number (9315571430532).

Almost surely, 2^{18631142861063} is an apocalyptic number.

18631142861063 is a deficient number, since it is larger than the sum of its proper divisors (1).

18631142861063 is an equidigital number, since it uses as much as digits as its factorization.

18631142861063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 18631142861063 in words is "eighteen trillion, six hundred thirty-one billion, one hundred forty-two million, eight hundred sixty-one thousand, sixty-three".