18408345 has 16 divisors (see below), whose sum is σ = 29506560. Its totient is φ = 9800064.

The previous prime is 18408329. The next prime is 18408347. The reversal of 18408345 is 54380481.

It is not a de Polignac number, because 18408345 - 2⁴ = 18408329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18408347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15741 + ... + 16869.

It is an arithmetic number, because the mean of its divisors is an integer number (1844160).

Almost surely, 2^18408345 is an apocalyptic number.

18408345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18408345 is a deficient number, since it is larger than the sum of its proper divisors (11098215).

18408345 is a wasteful number, since it uses less digits than its factorization.

18408345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 18408345 is about 4290.4947267186. The cubic root of 18408345 is about 264.0411293817.

The spelling of 18408345 in words is "eighteen million, four hundred eight thousand, three hundred forty-five".