18168267271 has 16 divisors (see below), whose sum is σ = 22697526528. Its totient is φ = 14128228800.

The previous prime is 18168267269. The next prime is 18168267277. The reversal of 18168267271 is 17276286181.

It is not a de Polignac number, because 18168267271 - 2¹ = 18168267269 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 (18168267277) 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, 202470 + ... + 278083.

It is an arithmetic number, because the mean of its divisors is an integer number (1418595408).

Almost surely, 2^18168267271 is an apocalyptic number.

18168267271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18168267271 is a deficient number, since it is larger than the sum of its proper divisors (4529259257).

18168267271 is a wasteful number, since it uses less digits than its factorization.

18168267271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481062.

The product of its digits is 451584, while the sum is 49.

The spelling of 18168267271 in words is "eighteen billion, one hundred sixty-eight million, two hundred sixty-seven thousand, two hundred seventy-one".