18116473 has 2 divisors, whose sum is σ = 18116474. Its totient is φ = 18116472.

The previous prime is 18116453. The next prime is 18116477. The reversal of 18116473 is 37461181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15657849 + 2458624 = 3957^2 + 1568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18116473 is a prime.

It is not a weakly prime, because it can be changed into another prime (18116477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9058236 + 9058237.

It is an arithmetic number, because the mean of its divisors is an integer number (9058237).

Almost surely, 2^18116473 is an apocalyptic number.

It is an amenable number.

18116473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18116473 is an equidigital number, since it uses as much as digits as its factorization.

18116473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 18116473 is about 4256.3450283077. The cubic root of 18116473 is about 262.6381942033.

The spelling of 18116473 in words is "eighteen million, one hundred sixteen thousand, four hundred seventy-three".