18002973 has 8 divisors (see below), whose sum is σ = 24342336. Its totient is φ = 11832800.

The previous prime is 18002969. The next prime is 18002989. The reversal of 18002973 is 37920081.

It is a happy number.

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 18002973 - 2² = 18002969 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18002973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18002903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42048 + ... + 42473.

It is an arithmetic number, because the mean of its divisors is an integer number (3042792).

Almost surely, 2^18002973 is an apocalyptic number.

It is an amenable number.

18002973 is a deficient number, since it is larger than the sum of its proper divisors (6339363).

18002973 is an equidigital number, since it uses as much as digits as its factorization.

18002973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84595.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 18002973 is about 4242.9910440631. The cubic root of 18002973 is about 262.0885672639.

The spelling of 18002973 in words is "eighteen million, two thousand, nine hundred seventy-three".