18889022 has 4 divisors (see below), whose sum is σ = 28333536. Its totient is φ = 9444510.

The previous prime is 18889019. The next prime is 18889033. The reversal of 18889022 is 22098881.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4722254 + ... + 4722257.

It is an arithmetic number, because the mean of its divisors is an integer number (7083384).

Almost surely, 2^18889022 is an apocalyptic number.

18889022 is a deficient number, since it is larger than the sum of its proper divisors (9444514).

18889022 is an equidigital number, since it uses as much as digits as its factorization.

18889022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9444513.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 18889022 is about 4346.1502505091. The cubic root of 18889022 is about 266.3196169355.

The spelling of 18889022 in words is "eighteen million, eight hundred eighty-nine thousand, twenty-two".