18013716 has 36 divisors (see below), whose sum is σ = 52040352. Its totient is φ = 5146704.

The previous prime is 18013711. The next prime is 18013741. The reversal of 18013716 is 61731081.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 18013716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18013711) 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 11 ways as a sum of consecutive naturals, for example, 35490 + ... + 35993.

Almost surely, 2^18013716 is an apocalyptic number.

It is an amenable number.

18013716 is an abundant number, since it is smaller than the sum of its proper divisors (34026636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18013716 is a wasteful number, since it uses less digits than its factorization.

18013716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71500 (or 71495 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 18013716 is about 4244.2568254054. The cubic root of 18013716 is about 262.1406893515.

Adding to 18013716 its reverse (61731081), we get a palindrome (79744797).

The spelling of 18013716 in words is "eighteen million, thirteen thousand, seven hundred sixteen".