18506345 has 36 divisors (see below), whose sum is σ = 26578188. Its totient is φ = 12355200.

The previous prime is 18506309. The next prime is 18506351. The reversal of 18506345 is 54360581.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 9554281 + 8952064 = 3091^2 + 2992^2 .

It is not a de Polignac number, because 18506345 - 2²⁴ = 1729129 is a prime.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 102155 + ... + 102335.

It is an arithmetic number, because the mean of its divisors is an integer number (738283).

Almost surely, 2^18506345 is an apocalyptic number.

It is an amenable number.

18506345 is a deficient number, since it is larger than the sum of its proper divisors (8071843).

18506345 is a wasteful number, since it uses less digits than its factorization.

18506345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 18506345 is about 4301.9001615565. The cubic root of 18506345 is about 264.5088565186.

The spelling of 18506345 in words is "eighteen million, five hundred six thousand, three hundred forty-five".