19629434173 has 2 divisors, whose sum is σ = 19629434174. Its totient is φ = 19629434172.

The previous prime is 19629434159. The next prime is 19629434177. The reversal of 19629434173 is 37143492691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13075236409 + 6554197764 = 114347^2 + 80958^2 .

It is an emirp because it is prime and its reverse (37143492691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19629434173 - 2⁵ = 19629434141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19629434177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9814717086 + 9814717087.

It is an arithmetic number, because the mean of its divisors is an integer number (9814717087).

Almost surely, 2^19629434173 is an apocalyptic number.

It is an amenable number.

19629434173 is a deficient number, since it is larger than the sum of its proper divisors (1).

19629434173 is an equidigital number, since it uses as much as digits as its factorization.

19629434173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The spelling of 19629434173 in words is "nineteen billion, six hundred twenty-nine million, four hundred thirty-four thousand, one hundred seventy-three".