18366683388355 has 4 divisors (see below), whose sum is σ = 22040020066032. Its totient is φ = 14693346710680.

The previous prime is 18366683388349. The next prime is 18366683388437. The reversal of 18366683388355 is 55388338666381.

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

It is not a de Polignac number, because 18366683388355 - 2²³ = 18366674999747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836668338831 + ... + 1836668338840.

It is an arithmetic number, because the mean of its divisors is an integer number (5510005016508).

Almost surely, 2^{18366683388355} is an apocalyptic number.

18366683388355 is a deficient number, since it is larger than the sum of its proper divisors (3673336677677).

18366683388355 is an equidigital number, since it uses as much as digits as its factorization.

18366683388355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673336677676.

The product of its digits is 1791590400, while the sum is 73.

The spelling of 18366683388355 in words is "eighteen trillion, three hundred sixty-six billion, six hundred eighty-three million, three hundred eighty-eight thousand, three hundred fifty-five".