18328703 has 4 divisors (see below), whose sum is σ = 19406880. Its totient is φ = 17250528.

The previous prime is 18328693. The next prime is 18328729. The reversal of 18328703 is 30782381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30782381 = 7 ⋅4397483.

It is a cyclic number.

It is not a de Polignac number, because 18328703 - 2¹⁰ = 18327679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18328703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18328003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539063 + ... + 539096.

It is an arithmetic number, because the mean of its divisors is an integer number (4851720).

Almost surely, 2^18328703 is an apocalyptic number.

18328703 is a deficient number, since it is larger than the sum of its proper divisors (1078177).

18328703 is a wasteful number, since it uses less digits than its factorization.

18328703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078176.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 18328703 is about 4281.2034523017. The cubic root of 18328703 is about 263.6597957517.

The spelling of 18328703 in words is "eighteen million, three hundred twenty-eight thousand, seven hundred three".