18730670873 has 4 divisors (see below), whose sum is σ = 19832475060. Its totient is φ = 17628866688.

The previous prime is 18730670867. The next prime is 18730670879. The reversal of 18730670873 is 37807603781.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (18730670867) and next prime (18730670879).

It can be written as a sum of positive squares in 2 ways, for example, as 12554754304 + 6175916569 = 112048^2 + 78587^2 .

It is a cyclic number.

It is not a de Polignac number, because 18730670873 - 2⁴ = 18730670857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18730670879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550902068 + ... + 550902101.

It is an arithmetic number, because the mean of its divisors is an integer number (4958118765).

Almost surely, 2^18730670873 is an apocalyptic number.

It is an amenable number.

18730670873 is a deficient number, since it is larger than the sum of its proper divisors (1101804187).

18730670873 is a wasteful number, since it uses less digits than its factorization.

18730670873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101804186.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 18730670873 in words is "eighteen billion, seven hundred thirty million, six hundred seventy thousand, eight hundred seventy-three".