18354175397181 has 18 divisors (see below), whose sum is σ = 28707812803098. Its totient is φ = 11294877166560.

The previous prime is 18354175397161. The next prime is 18354175397231. The reversal of 18354175397181 is 18179357145381.

18354175397181 is a `hidden beast` number, since 1 + 8 + 3 + 5 + 4 + 17 + 539 + 7 + 1 + 81 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 478960884900 + 17875214512281 = 692070^2 + 4227909^2 .

It is not a de Polignac number, because 18354175397181 - 2⁷ = 18354175397053 is a prime.

It is a super-2 number, since 2×18354175397181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18354175397161) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6033586710 + ... + 6033589751.

It is an arithmetic number, because the mean of its divisors is an integer number (1594878489061).

Almost surely, 2^{18354175397181} is an apocalyptic number.

It is an amenable number.

18354175397181 is a deficient number, since it is larger than the sum of its proper divisors (10353637405917).

18354175397181 is a wasteful number, since it uses less digits than its factorization.

18354175397181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12067176493 (or 12067176477 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 63.

The spelling of 18354175397181 in words is "eighteen trillion, three hundred fifty-four billion, one hundred seventy-five million, three hundred ninety-seven thousand, one hundred eighty-one".