20235223 has 4 divisors (see below), whose sum is σ = 20356560. Its totient is φ = 20113888.

The previous prime is 20235221. The next prime is 20235233. The reversal of 20235223 is 32253202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32253202 = 2 ⋅16126601.

It is a cyclic number.

It is not a de Polignac number, because 20235223 - 2¹ = 20235221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20235223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20235221) 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, 60418 + ... + 60751.

It is an arithmetic number, because the mean of its divisors is an integer number (5089140).

Almost surely, 2^20235223 is an apocalyptic number.

20235223 is a deficient number, since it is larger than the sum of its proper divisors (121337).

20235223 is a wasteful number, since it uses less digits than its factorization.

20235223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121336.

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 20235223 is about 4498.3578114685. The cubic root of 20235223 is about 272.5017725665.

Adding to 20235223 its reverse (32253202), we get a palindrome (52488425).

The spelling of 20235223 in words is "twenty million, two hundred thirty-five thousand, two hundred twenty-three".