18635473 has 2 divisors, whose sum is σ = 18635474. Its totient is φ = 18635472.

The previous prime is 18635467. The next prime is 18635509. The reversal of 18635473 is 37453681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15618304 + 3017169 = 3952^2 + 1737^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18635473 is a prime.

It is not a weakly prime, because it can be changed into another prime (18635413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9317736 + 9317737.

It is an arithmetic number, because the mean of its divisors is an integer number (9317737).

Almost surely, 2^18635473 is an apocalyptic number.

It is an amenable number.

18635473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18635473 is an equidigital number, since it uses as much as digits as its factorization.

18635473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 18635473 is about 4316.8823240853. The cubic root of 18635473 is about 265.1226345886.

The spelling of 18635473 in words is "eighteen million, six hundred thirty-five thousand, four hundred seventy-three".