18522428 has 6 divisors (see below), whose sum is σ = 32414256. Its totient is φ = 9261212.

The previous prime is 18522421. The next prime is 18522431. The reversal of 18522428 is 82422581.

It is a junction number, because it is equal to n+sod(n) for n = 18522394 and 18522403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18522421) 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, 2315300 + ... + 2315307.

It is an arithmetic number, because the mean of its divisors is an integer number (5402376).

Almost surely, 2^18522428 is an apocalyptic number.

It is an amenable number.

18522428 is a deficient number, since it is larger than the sum of its proper divisors (13891828).

18522428 is a wasteful number, since it uses less digits than its factorization.

18522428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630611 (or 4630609 counting only the distinct ones).

The product of its digits is 10240, while the sum is 32.

The square root of 18522428 is about 4303.7690458481. The cubic root of 18522428 is about 264.5854584298.

The spelling of 18522428 in words is "eighteen million, five hundred twenty-two thousand, four hundred twenty-eight".