19810106929 has 2 divisors, whose sum is σ = 19810106930. Its totient is φ = 19810106928.

The previous prime is 19810106909. The next prime is 19810106947. The reversal of 19810106929 is 92960101891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14605205904 + 5204901025 = 120852^2 + 72145^2 .

It is a cyclic number.

It is not a de Polignac number, because 19810106929 - 2⁷ = 19810106801 is a prime.

It is a super-2 number, since 2×19810106929² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19810106909) 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, 9905053464 + 9905053465.

It is an arithmetic number, because the mean of its divisors is an integer number (9905053465).

Almost surely, 2^19810106929 is an apocalyptic number.

It is an amenable number.

19810106929 is a deficient number, since it is larger than the sum of its proper divisors (1).

19810106929 is an equidigital number, since it uses as much as digits as its factorization.

19810106929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 46.

The spelling of 19810106929 in words is "nineteen billion, eight hundred ten million, one hundred six thousand, nine hundred twenty-nine".