18036136 has 8 divisors (see below), whose sum is σ = 33817770. Its totient is φ = 9018064.

The previous prime is 18036119. The next prime is 18036157. The reversal of 18036136 is 63163081.

It can be written as a sum of positive squares in only one way, i.e., 16048036 + 1988100 = 4006^2 + 1410^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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, 1127251 + ... + 1127266.

Almost surely, 2^18036136 is an apocalyptic number.

It is an amenable number.

18036136 is a deficient number, since it is larger than the sum of its proper divisors (15781634).

18036136 is a wasteful number, since it uses less digits than its factorization.

18036136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254523 (or 2254519 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 18036136 is about 4246.8972203245. The cubic root of 18036136 is about 262.2493983240.

The spelling of 18036136 in words is "eighteen million, thirty-six thousand, one hundred thirty-six".