19512940067 has 2 divisors, whose sum is σ = 19512940068. Its totient is φ = 19512940066.

The previous prime is 19512939989. The next prime is 19512940103. The reversal of 19512940067 is 76004921591.

It is a strong prime.

It is an emirp because it is prime and its reverse (76004921591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19512940067 - 2³⁰ = 18439198243 is a prime.

It is not a weakly prime, because it can be changed into another prime (19512942067) 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, 9756470033 + 9756470034.

It is an arithmetic number, because the mean of its divisors is an integer number (9756470034).

Almost surely, 2^19512940067 is an apocalyptic number.

19512940067 is a deficient number, since it is larger than the sum of its proper divisors (1).

19512940067 is an equidigital number, since it uses as much as digits as its factorization.

19512940067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 19512940067 in words is "nineteen billion, five hundred twelve million, nine hundred forty thousand, sixty-seven".