18442168 has 8 divisors (see below), whose sum is σ = 34579080. Its totient is φ = 9221080.

The previous prime is 18442163. The next prime is 18442181. The reversal of 18442168 is 86124481.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×18442168² = 680227121080448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18442163) by changing a digit.

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, 1152628 + ... + 1152643.

It is an arithmetic number, because the mean of its divisors is an integer number (4322385).

Almost surely, 2^18442168 is an apocalyptic number.

It is an amenable number.

18442168 is a deficient number, since it is larger than the sum of its proper divisors (16136912).

18442168 is a wasteful number, since it uses less digits than its factorization.

18442168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305277 (or 2305273 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 18442168 is about 4294.4345378641. The cubic root of 18442168 is about 264.2027444724.

The spelling of 18442168 in words is "eighteen million, four hundred forty-two thousand, one hundred sixty-eight".