18458073 has 12 divisors (see below), whose sum is σ = 28230228. Its totient is φ = 11581440.

The previous prime is 18458071. The next prime is 18458093. The reversal of 18458073 is 37085481.

18458073 is a `hidden beast` number, since 1 + 8 + 4 + 580 + 73 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14953689 + 3504384 = 3867^2 + 1872^2 .

It is not a de Polignac number, because 18458073 - 2¹ = 18458071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18458071) 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 11 ways as a sum of consecutive naturals, for example, 60168 + ... + 60473.

It is an arithmetic number, because the mean of its divisors is an integer number (2352519).

Almost surely, 2^18458073 is an apocalyptic number.

It is an amenable number.

18458073 is a deficient number, since it is larger than the sum of its proper divisors (9772155).

18458073 is a wasteful number, since it uses less digits than its factorization.

18458073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120664 (or 120661 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 18458073 is about 4296.2859541702. The cubic root of 18458073 is about 264.2786743959.

The spelling of 18458073 in words is "eighteen million, four hundred fifty-eight thousand, seventy-three".