20223009 has 9 divisors (see below), whose sum is σ = 29230513. Its totient is φ = 13473012.

The previous prime is 20222987. The next prime is 20223023. The reversal of 20223009 is 90032202.

The square root of 20223009 is 4497.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 20223009 - 2¹¹ = 20220961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20222982 and 20223000.

It is not an unprimeable number, because it can be changed into a prime (20223059) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12742 + ... + 14240.

Almost surely, 2^20223009 is an apocalyptic number.

20223009 is the 4497-th square number.

20223009 is the 2249-th centered octagonal number.

It is an amenable number.

20223009 is a deficient number, since it is larger than the sum of its proper divisors (9007504).

20223009 is an frugal number, since it uses more digits than its factorization.

20223009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004 (or 1502 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The cubic root of 20223009 is about 272.4469340878.

The spelling of 20223009 in words is "twenty million, two hundred twenty-three thousand, nine".