18363636383 has 4 divisors (see below), whose sum is σ = 18552952320. Its totient is φ = 18174320448.

The previous prime is 18363636323. The next prime is 18363636391. The reversal of 18363636383 is 38363636381.

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

It is a cyclic number.

It is not a de Polignac number, because 18363636383 - 2⁸ = 18363636127 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18363636323) 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 3 ways as a sum of consecutive naturals, for example, 94657823 + ... + 94658016.

It is an arithmetic number, because the mean of its divisors is an integer number (4638238080).

Almost surely, 2^18363636383 is an apocalyptic number.

18363636383 is a deficient number, since it is larger than the sum of its proper divisors (189315937).

18363636383 is an equidigital number, since it uses as much as digits as its factorization.

18363636383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189315936.

The product of its digits is 3359232, while the sum is 50.

The spelling of 18363636383 in words is "eighteen billion, three hundred sixty-three million, six hundred thirty-six thousand, three hundred eighty-three".