18770222 has 4 divisors (see below), whose sum is σ = 28155336. Its totient is φ = 9385110.

The previous prime is 18770209. The next prime is 18770239. The reversal of 18770222 is 22207781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22207781 = 401 ⋅55381.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4692554 + ... + 4692557.

It is an arithmetic number, because the mean of its divisors is an integer number (7038834).

Almost surely, 2^18770222 is an apocalyptic number.

18770222 is a deficient number, since it is larger than the sum of its proper divisors (9385114).

18770222 is an equidigital number, since it uses as much as digits as its factorization.

18770222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9385113.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 18770222 is about 4332.4614251024. The cubic root of 18770222 is about 265.7601150105.

The spelling of 18770222 in words is "eighteen million, seven hundred seventy thousand, two hundred twenty-two".