20489203 has 18 divisors (see below), whose sum is σ = 24500196. Its totient is φ = 17081064.

The previous prime is 20489191. The next prime is 20489221. The reversal of 20489203 is 30298402.

It is not a de Polignac number, because 20489203 - 2¹⁷ = 20358131 is a prime.

It is the 4527-th Hogben number.

It is not an unprimeable number, because it can be changed into a prime (20489003) by changing a digit.

It is a nontrivial repunit in base 4526.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 259318 + ... + 259396.

It is an arithmetic number, because the mean of its divisors is an integer number (1361122).

Almost surely, 2^20489203 is an apocalyptic number.

20489203 is a deficient number, since it is larger than the sum of its proper divisors (4010993).

20489203 is an frugal number, since it uses more digits than its factorization.

20489203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20489203 is about 4526.5000828455. The cubic root of 20489203 is about 273.6371268642.

The spelling of 20489203 in words is "twenty million, four hundred eighty-nine thousand, two hundred three".