19756755089 has 2 divisors, whose sum is σ = 19756755090. Its totient is φ = 19756755088.

The previous prime is 19756755043. The next prime is 19756755107. The reversal of 19756755089 is 98055765791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19237690000 + 519065089 = 138700^2 + 22783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19756755089 is a prime.

It is not a weakly prime, because it can be changed into another prime (19756755589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9878377544 + 9878377545.

It is an arithmetic number, because the mean of its divisors is an integer number (9878377545).

Almost surely, 2^19756755089 is an apocalyptic number.

It is an amenable number.

19756755089 is a deficient number, since it is larger than the sum of its proper divisors (1).

19756755089 is an equidigital number, since it uses as much as digits as its factorization.

19756755089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23814000, while the sum is 62.

The spelling of 19756755089 in words is "nineteen billion, seven hundred fifty-six million, seven hundred fifty-five thousand, eighty-nine".