18383818365 has 48 divisors (see below), whose sum is σ = 34779214080. Its totient is φ = 8908986240.

The previous prime is 18383818363. The next prime is 18383818393. The reversal of 18383818365 is 56381838381.

18383818365 is a `hidden beast` number, since 183 + 8 + 381 + 83 + 6 + 5 = 666.

It is not a de Polignac number, because 18383818365 - 2¹ = 18383818363 is a prime.

It is a super-3 number, since 3×18383818365³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18383818363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1146876 + ... + 1162794.

It is an arithmetic number, because the mean of its divisors is an integer number (724566960).

Almost surely, 2^18383818365 is an apocalyptic number.

18383818365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18383818365 is a deficient number, since it is larger than the sum of its proper divisors (16395395715).

18383818365 is a wasteful number, since it uses less digits than its factorization.

18383818365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18274 (or 18271 counting only the distinct ones).

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

It can be divided in two parts, 18 and 383818365, that added together give a palindrome (383818383).

The spelling of 18383818365 in words is "eighteen billion, three hundred eighty-three million, eight hundred eighteen thousand, three hundred sixty-five".