18822297 has 16 divisors (see below), whose sum is σ = 27272448. Its totient is φ = 11477760.

The previous prime is 18822283. The next prime is 18822299. The reversal of 18822297 is 79222881.

It is not a de Polignac number, because 18822297 - 2¹⁹ = 18298009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (18822299) 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 15 ways as a sum of consecutive naturals, for example, 2272 + ... + 6542.

It is an arithmetic number, because the mean of its divisors is an integer number (1704528).

Almost surely, 2^18822297 is an apocalyptic number.

It is an amenable number.

18822297 is a deficient number, since it is larger than the sum of its proper divisors (8450151).

18822297 is a wasteful number, since it uses less digits than its factorization.

18822297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400.

The product of its digits is 32256, while the sum is 39.

The square root of 18822297 is about 4338.4671256102. The cubic root of 18822297 is about 266.0056578215.

The spelling of 18822297 in words is "eighteen million, eight hundred twenty-two thousand, two hundred ninety-seven".