19128298009 has 2 divisors, whose sum is σ = 19128298010. Its totient is φ = 19128298008.

The previous prime is 19128298003. The next prime is 19128298037. The reversal of 19128298009 is 90089282191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16777502784 + 2350795225 = 129528^2 + 48485^2 .

It is a cyclic number.

It is not a de Polignac number, because 19128298009 - 2²¹ = 19126200857 is a prime.

It is a super-2 number, since 2×19128298009² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19128298003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9564149004 + 9564149005.

It is an arithmetic number, because the mean of its divisors is an integer number (9564149005).

Almost surely, 2^19128298009 is an apocalyptic number.

It is an amenable number.

19128298009 is a deficient number, since it is larger than the sum of its proper divisors (1).

19128298009 is an equidigital number, since it uses as much as digits as its factorization.

19128298009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 49.

The spelling of 19128298009 in words is "nineteen billion, one hundred twenty-eight million, two hundred ninety-eight thousand, nine".