20503223 has 8 divisors (see below), whose sum is σ = 23242800. Its totient is φ = 17929728.

The previous prime is 20503213. The next prime is 20503229. The reversal of 20503223 is 32230502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20503223 - 2⁶ = 20503159 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 (20503229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41258 + ... + 41751.

It is an arithmetic number, because the mean of its divisors is an integer number (2905350).

Almost surely, 2^20503223 is an apocalyptic number.

20503223 is a deficient number, since it is larger than the sum of its proper divisors (2739577).

20503223 is a wasteful number, since it uses less digits than its factorization.

20503223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83041.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 20503223 is about 4528.0484758889. The cubic root of 20503223 is about 273.6995258720.

Adding to 20503223 its reverse (32230502), we get a palindrome (52733725).

The spelling of 20503223 in words is "twenty million, five hundred three thousand, two hundred twenty-three".