18366055 has 4 divisors (see below), whose sum is σ = 22039272. Its totient is φ = 14692840.

The previous prime is 18366011. The next prime is 18366059. The reversal of 18366055 is 55066381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55066381 = 971 ⋅56711.

It is not a de Polignac number, because 18366055 - 2²³ = 9977447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18366055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18366059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836601 + ... + 1836610.

It is an arithmetic number, because the mean of its divisors is an integer number (5509818).

Almost surely, 2^18366055 is an apocalyptic number.

18366055 is a deficient number, since it is larger than the sum of its proper divisors (3673217).

18366055 is an equidigital number, since it uses as much as digits as its factorization.

18366055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673216.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 18366055 is about 4285.5635568732. The cubic root of 18366055 is about 263.8387780174.

The spelling of 18366055 in words is "eighteen million, three hundred sixty-six thousand, fifty-five".