19210985089 has 2 divisors, whose sum is σ = 19210985090. Its totient is φ = 19210985088.

The previous prime is 19210985047. The next prime is 19210985111. The reversal of 19210985089 is 98058901291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17388378225 + 1822606864 = 131865^2 + 42692^2 .

It is a cyclic number.

It is not a de Polignac number, because 19210985089 - 2²⁷ = 19076767361 is a prime.

It is not a weakly prime, because it can be changed into another prime (19210985009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9605492544 + 9605492545.

It is an arithmetic number, because the mean of its divisors is an integer number (9605492545).

Almost surely, 2^19210985089 is an apocalyptic number.

It is an amenable number.

19210985089 is a deficient number, since it is larger than the sum of its proper divisors (1).

19210985089 is an equidigital number, since it uses as much as digits as its factorization.

19210985089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 52.

The spelling of 19210985089 in words is "nineteen billion, two hundred ten million, nine hundred eighty-five thousand, eighty-nine".