18045473 has 2 divisors, whose sum is σ = 18045474. Its totient is φ = 18045472.

The previous prime is 18045463. The next prime is 18045491. The reversal of 18045473 is 37454081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18037009 + 8464 = 4247^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 18045473 - 2¹⁶ = 17979937 is a prime.

It is not a weakly prime, because it can be changed into another prime (18045463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022736 + 9022737.

It is an arithmetic number, because the mean of its divisors is an integer number (9022737).

Almost surely, 2^18045473 is an apocalyptic number.

It is an amenable number.

18045473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18045473 is an equidigital number, since it uses as much as digits as its factorization.

18045473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 18045473 is about 4247.9963512225. The cubic root of 18045473 is about 262.2946445308.

The spelling of 18045473 in words is "eighteen million, forty-five thousand, four hundred seventy-three".