18113139881 has 8 divisors (see below), whose sum is σ = 18292123200. Its totient is φ = 17934216912.

The previous prime is 18113139871. The next prime is 18113139911. The reversal of 18113139881 is 18893131181.

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 18113139881 - 2⁶ = 18113139817 is a prime.

It is a super-2 number, since 2×18113139881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18113139871) 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, 807686 + ... + 829808.

It is an arithmetic number, because the mean of its divisors is an integer number (2286515400).

Almost surely, 2^18113139881 is an apocalyptic number.

It is an amenable number.

18113139881 is a deficient number, since it is larger than the sum of its proper divisors (178983319).

18113139881 is a wasteful number, since it uses less digits than its factorization.

18113139881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30175.

The product of its digits is 41472, while the sum is 44.

The spelling of 18113139881 in words is "eighteen billion, one hundred thirteen million, one hundred thirty-nine thousand, eight hundred eighty-one".