18448805 has 4 divisors (see below), whose sum is σ = 22138572. Its totient is φ = 14759040.

The previous prime is 18448799. The next prime is 18448841. The reversal of 18448805 is 50884481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50884481 = 1907 ⋅26683.

It can be written as a sum of positive squares in 2 ways, for example, as 10349089 + 8099716 = 3217^2 + 2846^2 .

It is not a de Polignac number, because 18448805 - 2⁴ = 18448789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1844876 + ... + 1844885.

It is an arithmetic number, because the mean of its divisors is an integer number (5534643).

Almost surely, 2^18448805 is an apocalyptic number.

It is an amenable number.

18448805 is a deficient number, since it is larger than the sum of its proper divisors (3689767).

18448805 is an equidigital number, since it uses as much as digits as its factorization.

18448805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3689766.

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 18448805 is about 4295.2072126965. The cubic root of 18448805 is about 264.2344345880.

The spelling of 18448805 in words is "eighteen million, four hundred forty-eight thousand, eight hundred five".