20320223 has 8 divisors (see below), whose sum is σ = 25334400. Its totient is φ = 15833880.

The previous prime is 20320211. The next prime is 20320241. The reversal of 20320223 is 32202302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20320223 - 2²⁰ = 19271647 is a prime.

It is a super-2 number, since 2×20320223² = 825822925539458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20320198 and 20320207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131873 + ... + 132026.

It is an arithmetic number, because the mean of its divisors is an integer number (3166800).

Almost surely, 2^20320223 is an apocalyptic number.

20320223 is a deficient number, since it is larger than the sum of its proper divisors (5014177).

20320223 is a wasteful number, since it uses less digits than its factorization.

20320223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263917.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 20320223 is about 4507.7958028287. The cubic root of 20320223 is about 272.8827961877.

Adding to 20320223 its reverse (32202302), we get a palindrome (52522525).

The spelling of 20320223 in words is "twenty million, three hundred twenty thousand, two hundred twenty-three".