18280382271881 has 8 divisors (see below), whose sum is σ = 19043639244000. Its totient is φ = 17532239299360.

The previous prime is 18280382271871. The next prime is 18280382271967. The reversal of 18280382271881 is 18817228308281.

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 18280382271881 - 2³⁸ = 18005504364937 is a prime.

It is a super-2 number, since 2×18280382271881² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18280382271881.

It is not an unprimeable number, because it can be changed into a prime (18280382271821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3778497431 + ... + 3778502268.

It is an arithmetic number, because the mean of its divisors is an integer number (2380454905500).

Almost surely, 2^{18280382271881} is an apocalyptic number.

It is an amenable number.

18280382271881 is a deficient number, since it is larger than the sum of its proper divisors (763256972119).

18280382271881 is an equidigital number, since it uses as much as digits as its factorization.

18280382271881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7556999799.

The product of its (nonzero) digits is 5505024, while the sum is 59.

The spelling of 18280382271881 in words is "eighteen trillion, two hundred eighty billion, three hundred eighty-two million, two hundred seventy-one thousand, eight hundred eighty-one".