16540203 has 16 divisors (see below), whose sum is σ = 23302400. Its totient is φ = 10406880.

The previous prime is 16540189. The next prime is 16540213. The reversal of 16540203 is 30204561.

It is a happy number.

It is not a de Polignac number, because 16540203 - 2⁵ = 16540171 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 16540203.

It is not an unprimeable number, because it can be changed into a prime (16540213) 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 15 ways as a sum of consecutive naturals, for example, 24693 + ... + 25353.

It is an arithmetic number, because the mean of its divisors is an integer number (1456400).

Almost surely, 2^16540203 is an apocalyptic number.

16540203 is a deficient number, since it is larger than the sum of its proper divisors (6762197).

16540203 is a wasteful number, since it uses less digits than its factorization.

16540203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 16540203 is about 4066.9648387956. The cubic root of 16540203 is about 254.7887677860.

Adding to 16540203 its reverse (30204561), we get a palindrome (46744764).

The spelling of 16540203 in words is "sixteen million, five hundred forty thousand, two hundred three".