19301267081 has 2 divisors, whose sum is σ = 19301267082. Its totient is φ = 19301267080.

The previous prime is 19301267077. The next prime is 19301267093. The reversal of 19301267081 is 18076210391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11890812025 + 7410455056 = 109045^2 + 86084^2 .

It is a cyclic number.

It is not a de Polignac number, because 19301267081 - 2² = 19301267077 is a prime.

It is a super-2 number, since 2×19301267081² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (19301267681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9650633540 + 9650633541.

It is an arithmetic number, because the mean of its divisors is an integer number (9650633541).

Almost surely, 2^19301267081 is an apocalyptic number.

It is an amenable number.

19301267081 is a deficient number, since it is larger than the sum of its proper divisors (1).

19301267081 is an equidigital number, since it uses as much as digits as its factorization.

19301267081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 19301267081 in words is "nineteen billion, three hundred one million, two hundred sixty-seven thousand, eighty-one".