18036317 has 8 divisors (see below), whose sum is σ = 19549656. Its totient is φ = 16540992.

The previous prime is 18036311. The next prime is 18036323. The reversal of 18036317 is 71363081.

It is an interprime number because it is at equal distance from previous prime (18036311) and next prime (18036323).

It can be written as a sum of positive squares in 4 ways, for example, as 3740356 + 14295961 = 1934^2 + 3781^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18036317 - 2¹² = 18032221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18036317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18036311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2378 + ... + 6459.

It is an arithmetic number, because the mean of its divisors is an integer number (2443707).

Almost surely, 2^18036317 is an apocalyptic number.

It is an amenable number.

18036317 is a deficient number, since it is larger than the sum of its proper divisors (1513339).

18036317 is a wasteful number, since it uses less digits than its factorization.

18036317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9007.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 18036317 is about 4246.9185299462. The cubic root of 18036317 is about 262.2502755811.

Adding to 18036317 its reverse (71363081), we get a palindrome (89399398).

The spelling of 18036317 in words is "eighteen million, thirty-six thousand, three hundred seventeen".