18825322 has 4 divisors (see below), whose sum is σ = 28237986. Its totient is φ = 9412660.

The previous prime is 18825311. The next prime is 18825329. The reversal of 18825322 is 22352881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22352881 = 29 ⋅770789.

It can be written as a sum of positive squares in only one way, i.e., 16719921 + 2105401 = 4089^2 + 1451^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18825329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4706329 + ... + 4706332.

Almost surely, 2^18825322 is an apocalyptic number.

18825322 is a deficient number, since it is larger than the sum of its proper divisors (9412664).

18825322 is an equidigital number, since it uses as much as digits as its factorization.

18825322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9412663.

The product of its digits is 7680, while the sum is 31.

The square root of 18825322 is about 4338.8157370416. The cubic root of 18825322 is about 266.0199073047.

The spelling of 18825322 in words is "eighteen million, eight hundred twenty-five thousand, three hundred twenty-two".