19217214889 has 2 divisors, whose sum is σ = 19217214890. Its totient is φ = 19217214888.

The previous prime is 19217214871. The next prime is 19217214917. The reversal of 19217214889 is 98841271291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18323683225 + 893531664 = 135365^2 + 29892^2 .

It is a cyclic number.

It is not a de Polignac number, because 19217214889 - 2⁵ = 19217214857 is a prime.

It is not a weakly prime, because it can be changed into another prime (19217224889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9608607444 + 9608607445.

It is an arithmetic number, because the mean of its divisors is an integer number (9608607445).

Almost surely, 2^19217214889 is an apocalyptic number.

It is an amenable number.

19217214889 is a deficient number, since it is larger than the sum of its proper divisors (1).

19217214889 is an equidigital number, since it uses as much as digits as its factorization.

19217214889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 52.

The spelling of 19217214889 in words is "nineteen billion, two hundred seventeen million, two hundred fourteen thousand, eight hundred eighty-nine".