19744150249 has 2 divisors, whose sum is σ = 19744150250. Its totient is φ = 19744150248.

The previous prime is 19744150213. The next prime is 19744150289. The reversal of 19744150249 is 94205144791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17713746649 + 2030403600 = 133093^2 + 45060^2 .

It is a cyclic number.

It is not a de Polignac number, because 19744150249 - 2¹⁷ = 19744019177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19744150199 and 19744150208.

It is not a weakly prime, because it can be changed into another prime (19744150289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9872075124 + 9872075125.

It is an arithmetic number, because the mean of its divisors is an integer number (9872075125).

Almost surely, 2^19744150249 is an apocalyptic number.

It is an amenable number.

19744150249 is a deficient number, since it is larger than the sum of its proper divisors (1).

19744150249 is an equidigital number, since it uses as much as digits as its factorization.

19744150249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 19744150249 in words is "nineteen billion, seven hundred forty-four million, one hundred fifty thousand, two hundred forty-nine".