18475845 has 16 divisors (see below), whose sum is σ = 30515712. Its totient is φ = 9535680.

The previous prime is 18475837. The next prime is 18475867. The reversal of 18475845 is 54857481.

It is not a de Polignac number, because 18475845 - 2³ = 18475837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18475797 and 18475806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19402 + ... + 20331.

It is an arithmetic number, because the mean of its divisors is an integer number (1907232).

Almost surely, 2^18475845 is an apocalyptic number.

18475845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18475845 is a deficient number, since it is larger than the sum of its proper divisors (12039867).

18475845 is a wasteful number, since it uses less digits than its factorization.

18475845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39772.

The product of its digits is 179200, while the sum is 42.

The square root of 18475845 is about 4298.3537546368. The cubic root of 18475845 is about 264.3634657320.

The spelling of 18475845 in words is "eighteen million, four hundred seventy-five thousand, eight hundred forty-five".