18206861214671 has 4 divisors (see below), whose sum is σ = 18208881738744. Its totient is φ = 18204840690600.

The previous prime is 18206861214599. The next prime is 18206861214673. The reversal of 18206861214671 is 17641216860281.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18206861214671 - 2¹⁰ = 18206861213647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18206861214673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010248520 + ... + 1010266541.

It is an arithmetic number, because the mean of its divisors is an integer number (4552220434686).

Almost surely, 2^{18206861214671} is an apocalyptic number.

18206861214671 is a deficient number, since it is larger than the sum of its proper divisors (2020524073).

18206861214671 is an equidigital number, since it uses as much as digits as its factorization.

18206861214671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020524072.

The product of its (nonzero) digits is 1548288, while the sum is 53.

The spelling of 18206861214671 in words is "eighteen trillion, two hundred six billion, eight hundred sixty-one million, two hundred fourteen thousand, six hundred seventy-one".