19689000811 has 2 divisors, whose sum is σ = 19689000812. Its totient is φ = 19689000810.

The previous prime is 19689000787. The next prime is 19689000833. The reversal of 19689000811 is 11800098691.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19689000811 - 2²⁵ = 19655446379 is a prime.

It is not a weakly prime, because it can be changed into another prime (19689000011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9844500405 + 9844500406.

It is an arithmetic number, because the mean of its divisors is an integer number (9844500406).

Almost surely, 2^19689000811 is an apocalyptic number.

19689000811 is a deficient number, since it is larger than the sum of its proper divisors (1).

19689000811 is an equidigital number, since it uses as much as digits as its factorization.

19689000811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 43.

The spelling of 19689000811 in words is "nineteen billion, six hundred eighty-nine million, eight hundred eleven", and thus it is an aban number.