18634287431867 has 2 divisors, whose sum is σ = 18634287431868. Its totient is φ = 18634287431866.

The previous prime is 18634287431839. The next prime is 18634287431911. The reversal of 18634287431867 is 76813478243681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18634287431867 - 2²⁰ = 18634286383291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18634287431797 and 18634287431806.

It is not a weakly prime, because it can be changed into another prime (18634287431807) 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, 9317143715933 + 9317143715934.

It is an arithmetic number, because the mean of its divisors is an integer number (9317143715934).

Almost surely, 2^{18634287431867} is an apocalyptic number.

18634287431867 is a deficient number, since it is larger than the sum of its proper divisors (1).

18634287431867 is an equidigital number, since it uses as much as digits as its factorization.

18634287431867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 260112384, while the sum is 68.

The spelling of 18634287431867 in words is "eighteen trillion, six hundred thirty-four billion, two hundred eighty-seven million, four hundred thirty-one thousand, eight hundred sixty-seven".