18407345 has 16 divisors (see below), whose sum is σ = 25515648. Its totient is φ = 12599040.

The previous prime is 18407341. The next prime is 18407357. The reversal of 18407345 is 54370481.

It is not a de Polignac number, because 18407345 - 2² = 18407341 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18407341) 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, 8909 + ... + 10778.

It is an arithmetic number, because the mean of its divisors is an integer number (1594728).

Almost surely, 2^18407345 is an apocalyptic number.

It is an amenable number.

18407345 is a deficient number, since it is larger than the sum of its proper divisors (7108303).

18407345 is a wasteful number, since it uses less digits than its factorization.

18407345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19720.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 18407345 is about 4290.3781884584. The cubic root of 18407345 is about 264.0363481098.

The spelling of 18407345 in words is "eighteen million, four hundred seven thousand, three hundred forty-five".