18370345 has 24 divisors (see below), whose sum is σ = 25941384. Its totient is φ = 12450816.

The previous prime is 18370343. The next prime is 18370357. The reversal of 18370345 is 54307381.

It can be written as a sum of positive squares in 4 ways, for example, as 17689 + 18352656 = 133^2 + 4284^2 .

It is not a de Polignac number, because 18370345 - 2¹ = 18370343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18370343) 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 23 ways as a sum of consecutive naturals, for example, 23379 + ... + 24151.

It is an arithmetic number, because the mean of its divisors is an integer number (1080891).

Almost surely, 2^18370345 is an apocalyptic number.

It is an amenable number.

18370345 is a deficient number, since it is larger than the sum of its proper divisors (7571039).

18370345 is an equidigital number, since it uses as much as digits as its factorization.

18370345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 882 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 18370345 is about 4286.0640452518. The cubic root of 18370345 is about 263.8593191778.

The spelling of 18370345 in words is "eighteen million, three hundred seventy thousand, three hundred forty-five".