18812205 has 24 divisors (see below), whose sum is σ = 32920992. Its totient is φ = 9936864.

The previous prime is 18812203. The next prime is 18812221. The reversal of 18812205 is 50221881.

It is not a de Polignac number, because 18812205 - 2¹ = 18812203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18812203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2862 + ... + 6768.

It is an arithmetic number, because the mean of its divisors is an integer number (1371708).

Almost surely, 2^18812205 is an apocalyptic number.

18812205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18812205 is a deficient number, since it is larger than the sum of its proper divisors (14108787).

18812205 is a wasteful number, since it uses less digits than its factorization.

18812205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025 (or 4022 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 18812205 is about 4337.3038860564. The cubic root of 18812205 is about 265.9581076734.

The spelling of 18812205 in words is "eighteen million, eight hundred twelve thousand, two hundred five".