19433649149 has 2 divisors, whose sum is σ = 19433649150. Its totient is φ = 19433649148.

The previous prime is 19433649139. The next prime is 19433649239. The reversal of 19433649149 is 94194633491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15923916100 + 3509733049 = 126190^2 + 59243^2 .

It is a cyclic number.

It is not a de Polignac number, because 19433649149 - 2⁸ = 19433648893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19433649149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19433649119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9716824574 + 9716824575.

It is an arithmetic number, because the mean of its divisors is an integer number (9716824575).

Almost surely, 2^19433649149 is an apocalyptic number.

It is an amenable number.

19433649149 is a deficient number, since it is larger than the sum of its proper divisors (1).

19433649149 is an equidigital number, since it uses as much as digits as its factorization.

19433649149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 53.

The spelling of 19433649149 in words is "nineteen billion, four hundred thirty-three million, six hundred forty-nine thousand, one hundred forty-nine".