18168305671 has 16 divisors (see below), whose sum is σ = 19960676640. Its totient is φ = 16459914240.

The previous prime is 18168305633. The next prime is 18168305677. The reversal of 18168305671 is 17650386181.

It is a cyclic number.

It is not a de Polignac number, because 18168305671 - 2⁹ = 18168305159 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 (18168305677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107515 + ... + 218851.

It is an arithmetic number, because the mean of its divisors is an integer number (1247542290).

Almost surely, 2^18168305671 is an apocalyptic number.

18168305671 is a deficient number, since it is larger than the sum of its proper divisors (1792370969).

18168305671 is a wasteful number, since it uses less digits than its factorization.

18168305671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111714.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 18168305671 in words is "eighteen billion, one hundred sixty-eight million, three hundred five thousand, six hundred seventy-one".