18853635881 has 4 divisors (see below), whose sum is σ = 18980170500. Its totient is φ = 18727101264.

The previous prime is 18853635863. The next prime is 18853635937.

It is a happy number.

18853635881 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3238634281 + 15615001600 = 56909^2 + 124960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18853635881 is a prime.

It is a super-2 number, since 2×18853635881² (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 (18853635811) 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 3 ways as a sum of consecutive naturals, for example, 63267086 + ... + 63267383.

It is an arithmetic number, because the mean of its divisors is an integer number (4745042625).

Almost surely, 2^18853635881 is an apocalyptic number.

It is an amenable number.

18853635881 is a deficient number, since it is larger than the sum of its proper divisors (126534619).

18853635881 is a wasteful number, since it uses less digits than its factorization.

18853635881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126534618.

The product of its digits is 5529600, while the sum is 56.

The spelling of 18853635881 in words is "eighteen billion, eight hundred fifty-three million, six hundred thirty-five thousand, eight hundred eighty-one".