18345117 has 16 divisors (see below), whose sum is σ = 28127232. Its totient is φ = 10418160.

The previous prime is 18345101. The next prime is 18345137. The reversal of 18345117 is 71154381.

It is not a de Polignac number, because 18345117 - 2⁴ = 18345101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18345137) 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, 892 + ... + 6122.

It is an arithmetic number, because the mean of its divisors is an integer number (1757952).

Almost surely, 2^18345117 is an apocalyptic number.

It is an amenable number.

18345117 is a deficient number, since it is larger than the sum of its proper divisors (9782115).

18345117 is a wasteful number, since it uses less digits than its factorization.

18345117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5408.

The product of its digits is 3360, while the sum is 30.

The square root of 18345117 is about 4283.1200076580. The cubic root of 18345117 is about 263.7384778177.

Adding to 18345117 its reverse (71154381), we get a palindrome (89499498).

The spelling of 18345117 in words is "eighteen million, three hundred forty-five thousand, one hundred seventeen".