18395473 has 2 divisors, whose sum is σ = 18395474. Its totient is φ = 18395472.

The previous prime is 18395467. The next prime is 18395527. The reversal of 18395473 is 37459381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9909904 + 8485569 = 3148^2 + 2913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18395473 is a prime.

It is not a weakly prime, because it can be changed into another prime (18695473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9197736 + 9197737.

It is an arithmetic number, because the mean of its divisors is an integer number (9197737).

Almost surely, 2^18395473 is an apocalyptic number.

It is an amenable number.

18395473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18395473 is an equidigital number, since it uses as much as digits as its factorization.

18395473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 18395473 is about 4288.9944042864. The cubic root of 18395473 is about 263.9795716133.

The spelling of 18395473 in words is "eighteen million, three hundred ninety-five thousand, four hundred seventy-three".