18986867222 has 4 divisors (see below), whose sum is σ = 28480300836. Its totient is φ = 9493433610.

The previous prime is 18986867171. The next prime is 18986867267. The reversal of 18986867222 is 22276868981.

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

It is a super-2 number, since 2×18986867222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 4746716804 + ... + 4746716807.

It is an arithmetic number, because the mean of its divisors is an integer number (7120075209).

Almost surely, 2^18986867222 is an apocalyptic number.

18986867222 is a deficient number, since it is larger than the sum of its proper divisors (9493433614).

18986867222 is an equidigital number, since it uses as much as digits as its factorization.

18986867222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9493433613.

The product of its digits is 9289728, while the sum is 59.

The spelling of 18986867222 in words is "eighteen billion, nine hundred eighty-six million, eight hundred sixty-seven thousand, two hundred twenty-two".