18036913 has 8 divisors (see below), whose sum is σ = 18386336. Its totient is φ = 17690400.

The previous prime is 18036877. The next prime is 18036923. The reversal of 18036913 is 31963081.

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

It is a cyclic number.

It is not a de Polignac number, because 18036913 - 2⁹ = 18036401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18036923) 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 in 7 ways as a sum of consecutive naturals, for example, 14818 + ... + 15988.

It is an arithmetic number, because the mean of its divisors is an integer number (2298292).

Almost surely, 2^18036913 is an apocalyptic number.

It is an amenable number.

18036913 is a deficient number, since it is larger than the sum of its proper divisors (349423).

18036913 is a wasteful number, since it uses less digits than its factorization.

18036913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 18036913 is about 4246.9886978894. The cubic root of 18036913 is about 262.2531641871.

Adding to 18036913 its reverse (31963081), we get a palindrome (49999994).

The spelling of 18036913 in words is "eighteen million, thirty-six thousand, nine hundred thirteen".