18014644 has 6 divisors (see below), whose sum is σ = 31525634. Its totient is φ = 9007320.

The previous prime is 18014599. The next prime is 18014653. The reversal of 18014644 is 44641081.

It can be written as a sum of positive squares in only one way, i.e., 14062500 + 3952144 = 3750^2 + 1988^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2251827 + ... + 2251834.

Almost surely, 2^18014644 is an apocalyptic number.

It is an amenable number.

18014644 is a deficient number, since it is larger than the sum of its proper divisors (13510990).

18014644 is a wasteful number, since it uses less digits than its factorization.

18014644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503665 (or 4503663 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 18014644 is about 4244.3661482016. The cubic root of 18014644 is about 262.1451907803.

The spelling of 18014644 in words is "eighteen million, fourteen thousand, six hundred forty-four".