18036428 has 6 divisors (see below), whose sum is σ = 31563756. Its totient is φ = 9018212.

The previous prime is 18036407. The next prime is 18036437. The reversal of 18036428 is 82463081.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 18036394 and 18036403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2254550 + ... + 2254557.

It is an arithmetic number, because the mean of its divisors is an integer number (5260626).

Almost surely, 2^18036428 is an apocalyptic number.

It is an amenable number.

18036428 is a deficient number, since it is larger than the sum of its proper divisors (13527328).

18036428 is a wasteful number, since it uses less digits than its factorization.

18036428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509111 (or 4509109 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 18036428 is about 4246.9315982248. The cubic root of 18036428 is about 262.2508135645.

The spelling of 18036428 in words is "eighteen million, thirty-six thousand, four hundred twenty-eight".