18730673 has 8 divisors (see below), whose sum is σ = 20399400. Its totient is φ = 17094528.

The previous prime is 18730643. The next prime is 18730687. The reversal of 18730673 is 37603781.

It can be written as a sum of positive squares in 4 ways, for example, as 7744 + 18722929 = 88^2 + 4327^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18730673 - 2⁶ = 18730609 is a prime.

It is a super-2 number, since 2×18730673² = 701676222065858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18730633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6938 + ... + 9251.

It is an arithmetic number, because the mean of its divisors is an integer number (2549925).

Almost surely, 2^18730673 is an apocalyptic number.

18730673 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18730673 is a deficient number, since it is larger than the sum of its proper divisors (1668727).

18730673 is a wasteful number, since it uses less digits than its factorization.

18730673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16291.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 18730673 is about 4327.8947538035. The cubic root of 18730673 is about 265.5733309051.

The spelling of 18730673 in words is "eighteen million, seven hundred thirty thousand, six hundred seventy-three".