19028903449 has 2 divisors, whose sum is σ = 19028903450. Its totient is φ = 19028903448.

The previous prime is 19028903431. The next prime is 19028903473. The reversal of 19028903449 is 94430982091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17911004224 + 1117899225 = 133832^2 + 33435^2 .

It is a cyclic number.

It is not a de Polignac number, because 19028903449 - 2²¹ = 19026806297 is a prime.

It is not a weakly prime, because it can be changed into another prime (19028903429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9514451724 + 9514451725.

It is an arithmetic number, because the mean of its divisors is an integer number (9514451725).

Almost surely, 2^19028903449 is an apocalyptic number.

It is an amenable number.

19028903449 is a deficient number, since it is larger than the sum of its proper divisors (1).

19028903449 is an equidigital number, since it uses as much as digits as its factorization.

19028903449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 19028903449 in words is "nineteen billion, twenty-eight million, nine hundred three thousand, four hundred forty-nine".