220023 has 16 divisors (see below), whose sum is σ = 338400. Its totient is φ = 141120.

The previous prime is 220021. The next prime is 220057. The reversal of 220023 is 320022.

It is not a de Polignac number, because 220023 - 2¹ = 220021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 219987 and 220014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021) 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, 643 + ... + 923.

It is an arithmetic number, because the mean of its divisors is an integer number (21150).

2²²⁰⁰²³ is an apocalyptic number.

220023 is a deficient number, since it is larger than the sum of its proper divisors (118377).

220023 is a wasteful number, since it uses less digits than its factorization.

220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 220023 is about 469.0660934239. The cubic root of 220023 is about 60.3702110317.

Adding to 220023 its reverse (320022), we get a palindrome (540045).

Subtracting 220023 from its reverse (320022), we obtain a palindrome (99999).

The spelling of 220023 in words is "two hundred twenty thousand, twenty-three", and thus it is an iban number.