18498845 has 4 divisors (see below), whose sum is σ = 22198620. Its totient is φ = 14799072.

The previous prime is 18498833. The next prime is 18498863. The reversal of 18498845 is 54889481.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4853209 + 13645636 = 2203^2 + 3694^2 .

It is a cyclic number.

It is not a de Polignac number, because 18498845 - 2⁴ = 18498829 is a prime.

It is a super-3 number, since 3×18498845³ (a number of 23 digits) contains 333 as substring.

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 18498845.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1849880 + ... + 1849889.

It is an arithmetic number, because the mean of its divisors is an integer number (5549655).

Almost surely, 2^18498845 is an apocalyptic number.

It is an amenable number.

18498845 is a deficient number, since it is larger than the sum of its proper divisors (3699775).

18498845 is an equidigital number, since it uses as much as digits as its factorization.

18498845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699774.

The product of its digits is 368640, while the sum is 47.

The square root of 18498845 is about 4301.0283654029. The cubic root of 18498845 is about 264.4731195056.

The spelling of 18498845 in words is "eighteen million, four hundred ninety-eight thousand, eight hundred forty-five".