18822945 has 8 divisors (see below), whose sum is σ = 30116736. Its totient is φ = 10038896.

The previous prime is 18822917. The next prime is 18822959. The reversal of 18822945 is 54922881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18822945 - 2¹⁰ = 18821921 is a prime.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 627417 + ... + 627446.

It is an arithmetic number, because the mean of its divisors is an integer number (3764592).

Almost surely, 2^18822945 is an apocalyptic number.

18822945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18822945 is a deficient number, since it is larger than the sum of its proper divisors (11293791).

18822945 is a wasteful number, since it uses less digits than its factorization.

18822945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254871.

The product of its digits is 46080, while the sum is 39.

The square root of 18822945 is about 4338.5418057223. The cubic root of 18822945 is about 266.0087104013.

The spelling of 18822945 in words is "eighteen million, eight hundred twenty-two thousand, nine hundred forty-five".