18600073 has 2 divisors, whose sum is σ = 18600074. Its totient is φ = 18600072.

The previous prime is 18600047. The next prime is 18600089. The reversal of 18600073 is 37000681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18558864 + 41209 = 4308^2 + 203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18600073 is a prime.

It is not a weakly prime, because it can be changed into another prime (18600173) by changing a digit.

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 as a sum of consecutive naturals, namely, 9300036 + 9300037.

It is an arithmetic number, because the mean of its divisors is an integer number (9300037).

Almost surely, 2^18600073 is an apocalyptic number.

It is an amenable number.

18600073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18600073 is an equidigital number, since it uses as much as digits as its factorization.

18600073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 18600073 is about 4312.7801937961. The cubic root of 18600073 is about 264.9546522617.

The spelling of 18600073 in words is "eighteen million, six hundred thousand, seventy-three".