20432223 has 16 divisors (see below), whose sum is σ = 34594560. Its totient is φ = 11675448.

The previous prime is 20432183. The next prime is 20432233. The reversal of 20432223 is 32223402.

It is not a de Polignac number, because 20432223 - 2⁸ = 20431967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20432196 and 20432205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20432233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53865 + ... + 54242.

It is an arithmetic number, because the mean of its divisors is an integer number (2162160).

Almost surely, 2^20432223 is an apocalyptic number.

20432223 is a deficient number, since it is larger than the sum of its proper divisors (14162337).

20432223 is a wasteful number, since it uses less digits than its factorization.

20432223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108123 (or 108117 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 20432223 is about 4520.2016547937. The cubic root of 20432223 is about 273.3832318513.

Adding to 20432223 its reverse (32223402), we get a palindrome (52655625).

The spelling of 20432223 in words is "twenty million, four hundred thirty-two thousand, two hundred twenty-three".