18222022222 has 4 divisors (see below), whose sum is σ = 27333033336. Its totient is φ = 9111011110.

The previous prime is 18222022207. The next prime is 18222022229. The reversal of 18222022222 is 22222022281.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22222022281 = 631 ⋅35217151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18222022229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4555505554 + ... + 4555505557.

It is an arithmetic number, because the mean of its divisors is an integer number (6833258334).

Almost surely, 2^18222022222 is an apocalyptic number.

18222022222 is a deficient number, since it is larger than the sum of its proper divisors (9111011114).

18222022222 is an equidigital number, since it uses as much as digits as its factorization.

18222022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111011113.

The product of its (nonzero) digits is 2048, while the sum is 25.

The spelling of 18222022222 in words is "eighteen billion, two hundred twenty-two million, twenty-two thousand, two hundred twenty-two".