18145498 has 16 divisors (see below), whose sum is σ = 31458240. Its totient is φ = 7688736.

The previous prime is 18145489. The next prime is 18145529. The reversal of 18145498 is 89454181.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18145498.

It is an unprimeable number.

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, 6036 + ... + 8527.

It is an arithmetic number, because the mean of its divisors is an integer number (1966140).

Almost surely, 2^18145498 is an apocalyptic number.

18145498 is a deficient number, since it is larger than the sum of its proper divisors (13312742).

18145498 is a wasteful number, since it uses less digits than its factorization.

18145498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14661.

The product of its digits is 46080, while the sum is 40.

The square root of 18145498 is about 4259.7532792405. The cubic root of 18145498 is about 262.7783798077.

The spelling of 18145498 in words is "eighteen million, one hundred forty-five thousand, four hundred ninety-eight".