18630673 has 6 divisors (see below), whose sum is σ = 19296134. Its totient is φ = 17987424.

The previous prime is 18630631. The next prime is 18630679. The reversal of 18630673 is 37603681.

It can be written as a sum of positive squares in 3 ways, for example, as 380689 + 18249984 = 617^2 + 4272^2 .

It is not a de Polignac number, because 18630673 - 2¹⁷ = 18499601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18630679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10236 + ... + 11917.

Almost surely, 2^18630673 is an apocalyptic number.

It is an amenable number.

18630673 is a deficient number, since it is larger than the sum of its proper divisors (665461).

18630673 is an equidigital number, since it uses as much as digits as its factorization.

18630673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22211 (or 22182 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 18630673 is about 4316.3263315000. The cubic root of 18630673 is about 265.0998697980.

The spelling of 18630673 in words is "eighteen million, six hundred thirty thousand, six hundred seventy-three".