19109345947 has 2 divisors, whose sum is σ = 19109345948. Its totient is φ = 19109345946.

The previous prime is 19109345923. The next prime is 19109345971. The reversal of 19109345947 is 74954390191.

It is a balanced prime because it is at equal distance from previous prime (19109345923) and next prime (19109345971).

It is a cyclic number.

It is not a de Polignac number, because 19109345947 - 2¹¹ = 19109343899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19109345894 and 19109345903.

It is not a weakly prime, because it can be changed into another prime (19109345447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9554672973 + 9554672974.

It is an arithmetic number, because the mean of its divisors is an integer number (9554672974).

Almost surely, 2^19109345947 is an apocalyptic number.

19109345947 is a deficient number, since it is larger than the sum of its proper divisors (1).

19109345947 is an equidigital number, since it uses as much as digits as its factorization.

19109345947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 19109345947 in words is "nineteen billion, one hundred nine million, three hundred forty-five thousand, nine hundred forty-seven".