18147916 has 12 divisors (see below), whose sum is σ = 31793832. Its totient is φ = 9063968.

The previous prime is 18147893. The next prime is 18147917. The reversal of 18147916 is 61974181.

It is not an unprimeable number, because it can be changed into a prime (18147917) 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 3 ways as a sum of consecutive naturals, for example, 2871 + ... + 6673.

It is an arithmetic number, because the mean of its divisors is an integer number (2649486).

Almost surely, 2^18147916 is an apocalyptic number.

It is an amenable number.

18147916 is a deficient number, since it is larger than the sum of its proper divisors (13645916).

18147916 is a wasteful number, since it uses less digits than its factorization.

18147916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5000 (or 4998 counting only the distinct ones).

The product of its digits is 12096, while the sum is 37.

The square root of 18147916 is about 4260.0370890404. The cubic root of 18147916 is about 262.7900515715.

It can be divided in two parts, 1814 and 7916, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 18147916 in words is "eighteen million, one hundred forty-seven thousand, nine hundred sixteen".