20045223 has 36 divisors (see below), whose sum is σ = 32366880. Its totient is φ = 11943360.

The previous prime is 20045197. The next prime is 20045237. The reversal of 20045223 is 32254002.

It is not a de Polignac number, because 20045223 - 2⁸ = 20044967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20045196 and 20045205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045243) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 85915 + ... + 86147.

It is an arithmetic number, because the mean of its divisors is an integer number (899080).

Almost surely, 2^20045223 is an apocalyptic number.

20045223 is a deficient number, since it is larger than the sum of its proper divisors (12321657).

20045223 is a wasteful number, since it uses less digits than its factorization.

20045223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 20045223 is about 4477.1891851920. The cubic root of 20045223 is about 271.6461978297.

Adding to 20045223 its reverse (32254002), we get a palindrome (52299225).

It can be divided in two parts, 2004 and 5223, that added together give a palindrome (7227).

The spelling of 20045223 in words is "twenty million, forty-five thousand, two hundred twenty-three".