18335368881 has 6 divisors (see below), whose sum is σ = 26484421730. Its totient is φ = 12223579248.

The previous prime is 18335368859. The next prime is 18335368949. The reversal of 18335368881 is 18886353381.

It can be written as a sum of positive squares in only one way, i.e., 16831170225 + 1504198656 = 129735^2 + 38784^2 .

It is not a de Polignac number, because 18335368881 - 2⁹ = 18335368369 is a prime.

It is a super-2 number, since 2×18335368881² (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 (18335328881) 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 5 ways as a sum of consecutive naturals, for example, 1018631596 + ... + 1018631613.

Almost surely, 2^18335368881 is an apocalyptic number.

It is an amenable number.

18335368881 is a deficient number, since it is larger than the sum of its proper divisors (8149052849).

18335368881 is a wasteful number, since it uses less digits than its factorization.

18335368881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037263215 (or 2037263212 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 18335368881 in words is "eighteen billion, three hundred thirty-five million, three hundred sixty-eight thousand, eight hundred eighty-one".