19899410009 has 2 divisors, whose sum is σ = 19899410010. Its totient is φ = 19899410008.

The previous prime is 19899409991. The next prime is 19899410033. The reversal of 19899410009 is 90001499891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19823232025 + 76177984 = 140795^2 + 8728^2 .

It is a cyclic number.

It is not a de Polignac number, because 19899410009 - 2¹⁶ = 19899344473 is a prime.

It is not a weakly prime, because it can be changed into another prime (19899410059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9949705004 + 9949705005.

It is an arithmetic number, because the mean of its divisors is an integer number (9949705005).

Almost surely, 2^19899410009 is an apocalyptic number.

It is an amenable number.

19899410009 is a deficient number, since it is larger than the sum of its proper divisors (1).

19899410009 is an equidigital number, since it uses as much as digits as its factorization.

19899410009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 50.

The spelling of 19899410009 in words is "nineteen billion, eight hundred ninety-nine million, four hundred ten thousand, nine".