18361358271 has 6 divisors (see below), whose sum is σ = 26521961960. Its totient is φ = 12240905508.

The previous prime is 18361358261. The next prime is 18361358273. The reversal of 18361358271 is 17285316381.

It is a happy number.

18361358271 is a `hidden beast` number, since 1 + 8 + 3 + 61 + 3 + 582 + 7 + 1 = 666.

It is not a de Polignac number, because 18361358271 - 2⁹ = 18361357759 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 (18361358273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1020075451 + ... + 1020075468.

Almost surely, 2^18361358271 is an apocalyptic number.

18361358271 is a deficient number, since it is larger than the sum of its proper divisors (8160603689).

18361358271 is a wasteful number, since it uses less digits than its factorization.

18361358271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040150925 (or 2040150922 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The spelling of 18361358271 in words is "eighteen billion, three hundred sixty-one million, three hundred fifty-eight thousand, two hundred seventy-one".