18144871081 has 8 divisors (see below), whose sum is σ = 18192838464. Its totient is φ = 18096966480.

The previous prime is 18144871049. The next prime is 18144871133. The reversal of 18144871081 is 18017844181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18144871081 - 2⁵ = 18144871049 is a prime.

It is a super-2 number, since 2×18144871081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18144877081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593926 + ... + 623728.

It is an arithmetic number, because the mean of its divisors is an integer number (2274104808).

Almost surely, 2^18144871081 is an apocalyptic number.

It is an amenable number.

18144871081 is a deficient number, since it is larger than the sum of its proper divisors (47967383).

18144871081 is an equidigital number, since it uses as much as digits as its factorization.

18144871081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31391.

The product of its (nonzero) digits is 57344, while the sum is 43.

The spelling of 18144871081 in words is "eighteen billion, one hundred forty-four million, eight hundred seventy-one thousand, eighty-one".