18605145 has 32 divisors (see below), whose sum is σ = 32522112. Its totient is φ = 9027072.

The previous prime is 18605143. The next prime is 18605149. The reversal of 18605145 is 54150681.

It is not a de Polignac number, because 18605145 - 2¹ = 18605143 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18605141) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 13582 + ... + 14888.

It is an arithmetic number, because the mean of its divisors is an integer number (1016316).

Almost surely, 2^18605145 is an apocalyptic number.

18605145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18605145 is a deficient number, since it is larger than the sum of its proper divisors (13916967).

18605145 is a wasteful number, since it uses less digits than its factorization.

18605145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 18605145 is about 4313.3681734811. The cubic root of 18605145 is about 264.9787333118.

The spelling of 18605145 in words is "eighteen million, six hundred five thousand, one hundred forty-five".