18132973 has 4 divisors (see below), whose sum is σ = 19087360. Its totient is φ = 17178588.

The previous prime is 18132953. The next prime is 18132977. The reversal of 18132973 is 37923181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18132973 - 2¹⁷ = 18001901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18132977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477165 + ... + 477202.

It is an arithmetic number, because the mean of its divisors is an integer number (4771840).

Almost surely, 2^18132973 is an apocalyptic number.

It is an amenable number.

18132973 is a deficient number, since it is larger than the sum of its proper divisors (954387).

18132973 is an equidigital number, since it uses as much as digits as its factorization.

18132973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954386.

The product of its digits is 9072, while the sum is 34.

The square root of 18132973 is about 4258.2828698902. The cubic root of 18132973 is about 262.7179046276.

The spelling of 18132973 in words is "eighteen million, one hundred thirty-two thousand, nine hundred seventy-three".