19110620797 has 2 divisors, whose sum is σ = 19110620798. Its totient is φ = 19110620796.

The previous prime is 19110620761. The next prime is 19110620813. The reversal of 19110620797 is 79702601191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19047036121 + 63584676 = 138011^2 + 7974^2 .

It is an emirp because it is prime and its reverse (79702601191) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19110620797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19110621797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9555310398 + 9555310399.

It is an arithmetic number, because the mean of its divisors is an integer number (9555310399).

Almost surely, 2^19110620797 is an apocalyptic number.

It is an amenable number.

19110620797 is a deficient number, since it is larger than the sum of its proper divisors (1).

19110620797 is an equidigital number, since it uses as much as digits as its factorization.

19110620797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 43.

The spelling of 19110620797 in words is "nineteen billion, one hundred ten million, six hundred twenty thousand, seven hundred ninety-seven".