18122361 has 16 divisors (see below), whose sum is σ = 25377600. Its totient is φ = 11487168.

The previous prime is 18122327. The next prime is 18122389. The reversal of 18122361 is 16322181.

It is not a de Polignac number, because 18122361 - 2¹⁴ = 18105977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18122311) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 4275 + ... + 7383.

It is an arithmetic number, because the mean of its divisors is an integer number (1586100).

Almost surely, 2^18122361 is an apocalyptic number.

It is an amenable number.

18122361 is a deficient number, since it is larger than the sum of its proper divisors (7255239).

18122361 is a wasteful number, since it uses less digits than its factorization.

18122361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208.

The product of its digits is 576, while the sum is 24.

The square root of 18122361 is about 4257.0366453673. The cubic root of 18122361 is about 262.6666442993. Note that the first 4 decimals are identical.

The spelling of 18122361 in words is "eighteen million, one hundred twenty-two thousand, three hundred sixty-one".