18224845 has 16 divisors (see below), whose sum is σ = 22543920. Its totient is φ = 14137344.

The previous prime is 18224837. The next prime is 18224849. The reversal of 18224845 is 54842281.

It can be written as a sum of positive squares in 8 ways, for example, as 635209 + 17589636 = 797^2 + 4194^2 .

It is a cyclic number.

It is not a de Polignac number, because 18224845 - 2³ = 18224837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18224845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18224849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25351 + ... + 26059.

It is an arithmetic number, because the mean of its divisors is an integer number (1408995).

Almost surely, 2^18224845 is an apocalyptic number.

It is an amenable number.

18224845 is a deficient number, since it is larger than the sum of its proper divisors (4319075).

18224845 is an equidigital number, since it uses as much as digits as its factorization.

18224845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864.

The product of its digits is 20480, while the sum is 34.

The square root of 18224845 is about 4269.0566873725. The cubic root of 18224845 is about 263.1608503914.

The spelling of 18224845 in words is "eighteen million, two hundred twenty-four thousand, eight hundred forty-five".