18118036 has 6 divisors (see below), whose sum is σ = 31706570. Its totient is φ = 9059016.

The previous prime is 18118033. The next prime is 18118057. The reversal of 18118036 is 63081181.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14899600 + 3218436 = 3860^2 + 1794^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18117995 and 18118013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18118031) 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, 2264751 + ... + 2264758.

Almost surely, 2^18118036 is an apocalyptic number.

It is an amenable number.

18118036 is a deficient number, since it is larger than the sum of its proper divisors (13588534).

18118036 is a wasteful number, since it uses less digits than its factorization.

18118036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4529513 (or 4529511 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 18118036 is about 4256.5286325831. The cubic root of 18118036 is about 262.6457470291.

The spelling of 18118036 in words is "eighteen million, one hundred eighteen thousand, thirty-six".