18667760306485 has 8 divisors (see below), whose sum is σ = 22411133211096. Its totient is φ = 14927661016320.

The previous prime is 18667760306477. The next prime is 18667760306501. The reversal of 18667760306485 is 58460306776681.

It can be written as a sum of positive squares in 4 ways, for example, as 522963278244 + 18144797028241 = 723162^2 + 4259671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18667760306485 - 2³ = 18667760306477 is a prime.

It is a super-2 number, since 2×18667760306485² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18667760306485.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 818391064 + ... + 818413873.

It is an arithmetic number, because the mean of its divisors is an integer number (2801391651387).

Almost surely, 2^{18667760306485} is an apocalyptic number.

It is an amenable number.

18667760306485 is a deficient number, since it is larger than the sum of its proper divisors (3743372904611).

18667760306485 is a wasteful number, since it uses less digits than its factorization.

18667760306485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636807223.

The product of its (nonzero) digits is 243855360, while the sum is 67.

The spelling of 18667760306485 in words is "eighteen trillion, six hundred sixty-seven billion, seven hundred sixty million, three hundred six thousand, four hundred eighty-five".