18853128081 has 32 divisors (see below), whose sum is σ = 29412700800. Its totient is φ = 11902334400.

The previous prime is 18853128079. The next prime is 18853128109. The reversal of 18853128081 is 18082135881.

18853128081 is a `hidden beast` number, since 18 + 8 + 531 + 28 + 0 + 81 = 666.

It is not a de Polignac number, because 18853128081 - 2¹ = 18853128079 is a prime.

It is a super-3 number, since 3×18853128081³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (18853128881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1551931 + ... + 1564031.

It is an arithmetic number, because the mean of its divisors is an integer number (919146900).

Almost surely, 2^18853128081 is an apocalyptic number.

It is an amenable number.

18853128081 is a deficient number, since it is larger than the sum of its proper divisors (10559572719).

18853128081 is a wasteful number, since it uses less digits than its factorization.

18853128081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15166 (or 15160 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 45.

It can be divided in two parts, 188531 and 28081, that added together give a palindrome (216612).

The spelling of 18853128081 in words is "eighteen billion, eight hundred fifty-three million, one hundred twenty-eight thousand, eighty-one".