19744223 has 2 divisors, whose sum is σ = 19744224. Its totient is φ = 19744222.

The previous prime is 19744217. The next prime is 19744261. The reversal of 19744223 is 32244791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19744223 - 2⁶ = 19744159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19744223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19744523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9872111 + 9872112.

It is an arithmetic number, because the mean of its divisors is an integer number (9872112).

Almost surely, 2^19744223 is an apocalyptic number.

19744223 is a deficient number, since it is larger than the sum of its proper divisors (1).

19744223 is an equidigital number, since it uses as much as digits as its factorization.

19744223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 19744223 is about 4443.4471978409. The cubic root of 19744223 is about 270.2796508113.

The spelling of 19744223 in words is "nineteen million, seven hundred forty-four thousand, two hundred twenty-three".