18025203 has 16 divisors (see below), whose sum is σ = 27527936. Its totient is φ = 10277280.

The previous prime is 18025187. The next prime is 18025223. The reversal of 18025203 is 30252081.

It is not a de Polignac number, because 18025203 - 2⁴ = 18025187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 18025203.

It is not an unprimeable number, because it can be changed into a prime (18025223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14808 + ... + 15978.

It is an arithmetic number, because the mean of its divisors is an integer number (1720496).

Almost surely, 2^18025203 is an apocalyptic number.

18025203 is a deficient number, since it is larger than the sum of its proper divisors (9502733).

18025203 is a wasteful number, since it uses less digits than its factorization.

18025203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 18025203 is about 4245.6098501864. The cubic root of 18025203 is about 262.1963982025.

Adding to 18025203 its reverse (30252081), we get a palindrome (48277284).

The spelling of 18025203 in words is "eighteen million, twenty-five thousand, two hundred three".