19011720071 has 2 divisors, whose sum is σ = 19011720072. Its totient is φ = 19011720070.

The previous prime is 19011720043. The next prime is 19011720097. The reversal of 19011720071 is 17002711091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19011720071 - 2¹⁰ = 19011719047 is a prime.

It is a super-2 number, since 2×19011720071² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19011720011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9505860035 + 9505860036.

It is an arithmetic number, because the mean of its divisors is an integer number (9505860036).

Almost surely, 2^19011720071 is an apocalyptic number.

19011720071 is a deficient number, since it is larger than the sum of its proper divisors (1).

19011720071 is an equidigital number, since it uses as much as digits as its factorization.

19011720071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 29.

The spelling of 19011720071 in words is "nineteen billion, eleven million, seven hundred twenty thousand, seventy-one".