18347145 has 16 divisors (see below), whose sum is σ = 29471040. Its totient is φ = 9746624.

The previous prime is 18347107. The next prime is 18347149. The reversal of 18347145 is 54174381.

It is a cyclic number.

It is not a de Polignac number, because 18347145 - 2⁹ = 18346633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18347149) 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 in 15 ways as a sum of consecutive naturals, for example, 1762 + ... + 6308.

It is an arithmetic number, because the mean of its divisors is an integer number (1841940).

Almost surely, 2^18347145 is an apocalyptic number.

18347145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18347145 is a deficient number, since it is larger than the sum of its proper divisors (11123895).

18347145 is a wasteful number, since it uses less digits than its factorization.

18347145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4824.

The product of its digits is 13440, while the sum is 33.

The square root of 18347145 is about 4283.3567444237. The cubic root of 18347145 is about 263.7481959701.

The spelling of 18347145 in words is "eighteen million, three hundred forty-seven thousand, one hundred forty-five".