18144803 has 4 divisors (see below), whose sum is σ = 18169968. Its totient is φ = 18119640.

The previous prime is 18144793. The next prime is 18144811. The reversal of 18144803 is 30844181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30844181 = 3613 ⋅8537.

It is a cyclic number.

It is not a de Polignac number, because 18144803 - 2¹⁴ = 18128419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18144823) 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, 11468 + ... + 12953.

It is an arithmetic number, because the mean of its divisors is an integer number (4542492).

Almost surely, 2^18144803 is an apocalyptic number.

18144803 is a deficient number, since it is larger than the sum of its proper divisors (25165).

18144803 is an equidigital number, since it uses as much as digits as its factorization.

18144803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25164.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 18144803 is about 4259.6717009648. The cubic root of 18144803 is about 262.7750248284.

Adding to 18144803 its reverse (30844181), we get a palindrome (48988984).

The spelling of 18144803 in words is "eighteen million, one hundred forty-four thousand, eight hundred three".