18811033011881 has 16 divisors (see below), whose sum is σ = 20546385538560. Its totient is φ = 17079901729920.

The previous prime is 18811033011839. The next prime is 18811033011949.

It is a happy number.

18811033011881 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 18811033011881 - 2²² = 18811028817577 is a prime.

It is a super-2 number, since 2×18811033011881² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18811033011811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32712200 + ... + 33282278.

It is an arithmetic number, because the mean of its divisors is an integer number (1284149096160).

Almost surely, 2^{18811033011881} is an apocalyptic number.

18811033011881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18811033011881 is a deficient number, since it is larger than the sum of its proper divisors (1735352526679).

18811033011881 is a wasteful number, since it uses less digits than its factorization.

18811033011881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573776.

The product of its (nonzero) digits is 36864, while the sum is 44.

It can be divided in two parts, 1881103 and 3011881, that added together give a palindrome (4892984).

The spelling of 18811033011881 in words is "eighteen trillion, eight hundred eleven billion, thirty-three million, eleven thousand, eight hundred eighty-one".