18508425166951 has 2 divisors, whose sum is σ = 18508425166952. Its totient is φ = 18508425166950.

The previous prime is 18508425166943. The next prime is 18508425166963. The reversal of 18508425166951 is 15966152480581.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18508425166951 - 2³ = 18508425166943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18508425166951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18508425166901) 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, 9254212583475 + 9254212583476.

It is an arithmetic number, because the mean of its divisors is an integer number (9254212583476).

Almost surely, 2^{18508425166951} is an apocalyptic number.

18508425166951 is a deficient number, since it is larger than the sum of its proper divisors (1).

18508425166951 is an equidigital number, since it uses as much as digits as its factorization.

18508425166951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736000, while the sum is 61.

The spelling of 18508425166951 in words is "eighteen trillion, five hundred eight billion, four hundred twenty-five million, one hundred sixty-six thousand, nine hundred fifty-one".