18052340881 has 3 divisors (see below), whose sum is σ = 18052475241. Its totient is φ = 18052206522.

The previous prime is 18052340869. The next prime is 18052340897. The reversal of 18052340881 is 18804325081.

The square root of 18052340881 is 134359.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 18052340881 - 2⁷ = 18052340753 is a prime.

It is a super-2 number, since 2×18052340881² (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 (18052340381) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 67180 + ... + 201538.

It is an arithmetic number, because the mean of its divisors is an integer number (6017491747).

Almost surely, 2^18052340881 is an apocalyptic number.

18052340881 is the 134359-th square number.

18052340881 is the 67180-th centered octagonal number.

It is an amenable number.

18052340881 is a deficient number, since it is larger than the sum of its proper divisors (134360).

18052340881 is an frugal number, since it uses more digits than its factorization.

18052340881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268718 (or 134359 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 40.

The spelling of 18052340881 in words is "eighteen billion, fifty-two million, three hundred forty thousand, eight hundred eighty-one".