22784423 has 2 divisors, whose sum is σ = 22784424. Its totient is φ = 22784422.

The previous prime is 22784417. The next prime is 22784449. The reversal of 22784423 is 32448722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22784423 - 2⁴ = 22784407 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22784423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22780423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11392211 + 11392212.

It is an arithmetic number, because the mean of its divisors is an integer number (11392212).

Almost surely, 2^22784423 is an apocalyptic number.

22784423 is a deficient number, since it is larger than the sum of its proper divisors (1).

22784423 is an equidigital number, since it uses as much as digits as its factorization.

22784423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 32.

The square root of 22784423 is about 4773.3031540014. The cubic root of 22784423 is about 283.4953968647.

The spelling of 22784423 in words is "twenty-two million, seven hundred eighty-four thousand, four hundred twenty-three".