18000497 has 4 divisors (see below), whose sum is σ = 18011136. Its totient is φ = 17989860.

The previous prime is 18000473. The next prime is 18000527. The reversal of 18000497 is 79400081.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18000497 - 2¹⁰ = 17999473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18000407) 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 3 ways as a sum of consecutive naturals, for example, 2153 + ... + 6374.

It is an arithmetic number, because the mean of its divisors is an integer number (4502784).

Almost surely, 2^18000497 is an apocalyptic number.

It is an amenable number.

18000497 is a deficient number, since it is larger than the sum of its proper divisors (10639).

18000497 is an equidigital number, since it uses as much as digits as its factorization.

18000497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10638.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 18000497 is about 4242.6992587267. The cubic root of 18000497 is about 262.0765514514.

The spelling of 18000497 in words is "eighteen million, four hundred ninety-seven", and thus it is an aban number.