18043205 has 16 divisors (see below), whose sum is σ = 23224320. Its totient is φ = 13408512.

The previous prime is 18043189. The next prime is 18043213. The reversal of 18043205 is 50234081.

It is not a de Polignac number, because 18043205 - 2⁴ = 18043189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5372 + ... + 8058.

It is an arithmetic number, because the mean of its divisors is an integer number (1451520).

Almost surely, 2^18043205 is an apocalyptic number.

It is an amenable number.

18043205 is a deficient number, since it is larger than the sum of its proper divisors (5181115).

18043205 is a wasteful number, since it uses less digits than its factorization.

18043205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 18043205 is about 4247.7293934525. The cubic root of 18043205 is about 262.2836554556.

Adding to 18043205 its reverse (50234081), we get a palindrome (68277286).

The spelling of 18043205 in words is "eighteen million, forty-three thousand, two hundred five".