18263868271 has 16 divisors (see below), whose sum is σ = 20639720448. Its totient is φ = 16011057600.

The previous prime is 18263868229. The next prime is 18263868307. The reversal of 18263868271 is 17286836281.

It is a cyclic number.

It is not a de Polignac number, because 18263868271 - 2¹⁹ = 18263343983 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 (18263868871) 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, 1875 + ... + 191131.

It is an arithmetic number, because the mean of its divisors is an integer number (1289982528).

Almost surely, 2^18263868271 is an apocalyptic number.

18263868271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18263868271 is a deficient number, since it is larger than the sum of its proper divisors (2375852177).

18263868271 is a wasteful number, since it uses less digits than its factorization.

18263868271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189582.

The product of its digits is 1548288, while the sum is 52.

The spelling of 18263868271 in words is "eighteen billion, two hundred sixty-three million, eight hundred sixty-eight thousand, two hundred seventy-one".