18622211155 has 4 divisors (see below), whose sum is σ = 22346653392. Its totient is φ = 14897768920.

The previous prime is 18622211141. The next prime is 18622211161. The reversal of 18622211155 is 55111222681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55111222681 = 29 ⋅1900386989.

It is not a de Polignac number, because 18622211155 - 2³³ = 10032276563 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 18622211155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1862221111 + ... + 1862221120.

It is an arithmetic number, because the mean of its divisors is an integer number (5586663348).

Almost surely, 2^18622211155 is an apocalyptic number.

18622211155 is a deficient number, since it is larger than the sum of its proper divisors (3724442237).

18622211155 is an equidigital number, since it uses as much as digits as its factorization.

18622211155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3724442236.

The product of its digits is 9600, while the sum is 34.

The spelling of 18622211155 in words is "eighteen billion, six hundred twenty-two million, two hundred eleven thousand, one hundred fifty-five".