18852155181 has 12 divisors (see below), whose sum is σ = 27245547420. Its totient is φ = 12561338880.

The previous prime is 18852155149. The next prime is 18852155191. The reversal of 18852155181 is 18155125881.

18852155181 is a `hidden beast` number, since 1 + 88 + 52 + 1 + 5 + 518 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7750161225 + 11101993956 = 88035^2 + 105366^2 .

It is not a de Polignac number, because 18852155181 - 2⁵ = 18852155149 is a prime.

It is a super-2 number, since 2×18852155181² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18852155191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546036 + ... + 579533.

It is an arithmetic number, because the mean of its divisors is an integer number (2270462285).

Almost surely, 2^18852155181 is an apocalyptic number.

It is an amenable number.

18852155181 is a deficient number, since it is larger than the sum of its proper divisors (8393392239).

18852155181 is a wasteful number, since it uses less digits than its factorization.

18852155181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127436 (or 1127433 counting only the distinct ones).

The product of its digits is 128000, while the sum is 45.

The spelling of 18852155181 in words is "eighteen billion, eight hundred fifty-two million, one hundred fifty-five thousand, one hundred eighty-one".