18181818363 has 4 divisors (see below), whose sum is σ = 24242424488. Its totient is φ = 12121212240.

The previous prime is 18181818301. The next prime is 18181818383. The reversal of 18181818363 is 36381818181.

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

It is not a de Polignac number, because 18181818363 - 2²¹ = 18179721211 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18181818383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030303058 + ... + 3030303063.

It is an arithmetic number, because the mean of its divisors is an integer number (6060606122).

Almost surely, 2^18181818363 is an apocalyptic number.

18181818363 is a deficient number, since it is larger than the sum of its proper divisors (6060606125).

18181818363 is an equidigital number, since it uses as much as digits as its factorization.

18181818363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060606124.

The product of its digits is 221184, while the sum is 48.

The spelling of 18181818363 in words is "eighteen billion, one hundred eighty-one million, eight hundred eighteen thousand, three hundred sixty-three".