18445703 has 4 divisors (see below), whose sum is σ = 18721080. Its totient is φ = 18170328.

The previous prime is 18445699. The next prime is 18445709. The reversal of 18445703 is 30754481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30754481 = 733 ⋅41957.

It is a cyclic number.

It is not a de Polignac number, because 18445703 - 2² = 18445699 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 18445703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18445709) 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 in 3 ways as a sum of consecutive naturals, for example, 137588 + ... + 137721.

It is an arithmetic number, because the mean of its divisors is an integer number (4680270).

Almost surely, 2^18445703 is an apocalyptic number.

18445703 is a deficient number, since it is larger than the sum of its proper divisors (275377).

18445703 is an equidigital number, since it uses as much as digits as its factorization.

18445703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275376.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 18445703 is about 4294.8460973590. The cubic root of 18445703 is about 264.2196242130.

The spelling of 18445703 in words is "eighteen million, four hundred forty-five thousand, seven hundred three".