20652223 has 4 divisors (see below), whose sum is σ = 21091680. Its totient is φ = 20212768.

The previous prime is 20652187. The next prime is 20652239. The reversal of 20652223 is 32225602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20652223 - 2²¹ = 18555071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20652194 and 20652203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20652323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219658 + ... + 219751.

It is an arithmetic number, because the mean of its divisors is an integer number (5272920).

Almost surely, 2^20652223 is an apocalyptic number.

20652223 is a deficient number, since it is larger than the sum of its proper divisors (439457).

20652223 is an equidigital number, since it uses as much as digits as its factorization.

20652223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439456.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20652223 is about 4544.4716964681. The cubic root of 20652223 is about 274.3609314552.

Adding to 20652223 its reverse (32225602), we get a palindrome (52877825).

The spelling of 20652223 in words is "twenty million, six hundred fifty-two thousand, two hundred twenty-three".