18668685201671 has 8 divisors (see below), whose sum is σ = 18959313905664. Its totient is φ = 18380300735160.

The previous prime is 18668685201667. The next prime is 18668685201689. The reversal of 18668685201671 is 17610258686681.

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

It is a cyclic number.

It is not a de Polignac number, because 18668685201671 - 2² = 18668685201667 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18668685201598 and 18668685201607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18668685206671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561042605 + ... + 561075878.

It is an arithmetic number, because the mean of its divisors is an integer number (2369914238208).

Almost surely, 2^{18668685201671} is an apocalyptic number.

18668685201671 is a deficient number, since it is larger than the sum of its proper divisors (290628703993).

18668685201671 is a wasteful number, since it uses less digits than its factorization.

18668685201671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122118741.

The product of its (nonzero) digits is 46448640, while the sum is 65.

The spelling of 18668685201671 in words is "eighteen trillion, six hundred sixty-eight billion, six hundred eighty-five million, two hundred one thousand, six hundred seventy-one".