18447064 has 8 divisors (see below), whose sum is σ = 34588260. Its totient is φ = 9223528.

The previous prime is 18447061. The next prime is 18447109. The reversal of 18447064 is 46074481.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18447061) 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, 1152934 + ... + 1152949.

Almost surely, 2^18447064 is an apocalyptic number.

It is an amenable number.

18447064 is a deficient number, since it is larger than the sum of its proper divisors (16141196).

18447064 is a wasteful number, since it uses less digits than its factorization.

18447064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305889 (or 2305885 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 18447064 is about 4295.0045401606. The cubic root of 18447064 is about 264.2261224575.

The spelling of 18447064 in words is "eighteen million, four hundred forty-seven thousand, sixty-four".