18145593 has 8 divisors (see below), whose sum is σ = 26882400. Its totient is φ = 12097044.

The previous prime is 18145529. The next prime is 18145637. The reversal of 18145593 is 39554181.

It is not a de Polignac number, because 18145593 - 2⁶ = 18145529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18145093) 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 7 ways as a sum of consecutive naturals, for example, 336003 + ... + 336056.

It is an arithmetic number, because the mean of its divisors is an integer number (3360300).

Almost surely, 2^18145593 is an apocalyptic number.

It is an amenable number.

18145593 is a deficient number, since it is larger than the sum of its proper divisors (8736807).

18145593 is an equidigital number, since it uses as much as digits as its factorization.

18145593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672068 (or 672062 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 18145593 is about 4259.7644301064. The cubic root of 18145593 is about 262.7788383953.

The spelling of 18145593 in words is "eighteen million, one hundred forty-five thousand, five hundred ninety-three".