20224423 has 2 divisors, whose sum is σ = 20224424. Its totient is φ = 20224422.

The previous prime is 20224387. The next prime is 20224447. The reversal of 20224423 is 32442202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20224423 - 2²¹ = 18127271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20224423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20224453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112211 + 10112212.

It is an arithmetic number, because the mean of its divisors is an integer number (10112212).

Almost surely, 2^20224423 is an apocalyptic number.

20224423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20224423 is an equidigital number, since it uses as much as digits as its factorization.

20224423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 20224423 is about 4497.1572131737. The cubic root of 20224423 is about 272.4532838021.

Adding to 20224423 its reverse (32442202), we get a palindrome (52666625).

The spelling of 20224423 in words is "twenty million, two hundred twenty-four thousand, four hundred twenty-three".