18182073 has 16 divisors (see below), whose sum is σ = 29837696. Its totient is φ = 9590400.

The previous prime is 18182071. The next prime is 18182083. The reversal of 18182073 is 37028181.

It is a happy number.

It is not a de Polignac number, because 18182073 - 2¹ = 18182071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18182073.

It is not an unprimeable number, because it can be changed into a prime (18182071) 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, 33028 + ... + 33573.

It is an arithmetic number, because the mean of its divisors is an integer number (1864856).

Almost surely, 2^18182073 is an apocalyptic number.

18182073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18182073 is a deficient number, since it is larger than the sum of its proper divisors (11655623).

18182073 is a wasteful number, since it uses less digits than its factorization.

18182073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66624.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 18182073 is about 4264.0442070879. The cubic root of 18182073 is about 262.9548178587.

The spelling of 18182073 in words is "eighteen million, one hundred eighty-two thousand, seventy-three".