28201820183 has 4 divisors (see below), whose sum is σ = 29860750800. Its totient is φ = 26542889568.

The previous prime is 28201820173. The next prime is 28201820221. The reversal of 28201820183 is 38102810282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38102810282 = 2 ⋅19051405141.

It is a cyclic number.

It is not a de Polignac number, because 28201820183 - 2¹⁰ = 28201819159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28201820113) 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, 829465283 + ... + 829465316.

It is an arithmetic number, because the mean of its divisors is an integer number (7465187700).

Almost surely, 2^28201820183 is an apocalyptic number.

28201820183 is a deficient number, since it is larger than the sum of its proper divisors (1658930617).

28201820183 is a wasteful number, since it uses less digits than its factorization.

28201820183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658930616.

The product of its (nonzero) digits is 12288, while the sum is 35.

Subtracting 28201820183 from its reverse (38102810282), we obtain a palindrome (9900990099).

The spelling of 28201820183 in words is "twenty-eight billion, two hundred one million, eight hundred twenty thousand, one hundred eighty-three".