18463916 has 6 divisors (see below), whose sum is σ = 32311860. Its totient is φ = 9231956.

The previous prime is 18463909. The next prime is 18463919. The reversal of 18463916 is 61936481.

It is a self number, because there is not a number n which added to its sum of digits gives 18463916.

It is not an unprimeable number, because it can be changed into a prime (18463919) 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 as a sum of consecutive naturals, namely, 2307986 + ... + 2307993.

It is an arithmetic number, because the mean of its divisors is an integer number (5385310).

Almost surely, 2^18463916 is an apocalyptic number.

It is an amenable number.

18463916 is a deficient number, since it is larger than the sum of its proper divisors (13847944).

18463916 is a wasteful number, since it uses less digits than its factorization.

18463916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4615983 (or 4615981 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 18463916 is about 4296.9659063111. The cubic root of 18463916 is about 264.3065577216.

The spelling of 18463916 in words is "eighteen million, four hundred sixty-three thousand, nine hundred sixteen".