19999010203 has 2 divisors, whose sum is σ = 19999010204. Its totient is φ = 19999010202.

The previous prime is 19999010153. The next prime is 19999010221. The reversal of 19999010203 is 30201099991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19999010203 - 2⁹ = 19999009691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19999010203.

It is not a weakly prime, because it can be changed into another prime (19999010243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9999505101 + 9999505102.

It is an arithmetic number, because the mean of its divisors is an integer number (9999505102).

Almost surely, 2^19999010203 is an apocalyptic number.

19999010203 is a deficient number, since it is larger than the sum of its proper divisors (1).

19999010203 is an equidigital number, since it uses as much as digits as its factorization.

19999010203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 43.

The spelling of 19999010203 in words is "nineteen billion, nine hundred ninety-nine million, ten thousand, two hundred three".