18859734073 has 2 divisors, whose sum is σ = 18859734074. Its totient is φ = 18859734072.

The previous prime is 18859734029. The next prime is 18859734107. The reversal of 18859734073 is 37043795881.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15270286329 + 3589447744 = 123573^2 + 59912^2 .

It is a cyclic number.

It is not a de Polignac number, because 18859734073 - 2²¹ = 18857636921 is a prime.

It is not a weakly prime, because it can be changed into another prime (18859731073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9429867036 + 9429867037.

It is an arithmetic number, because the mean of its divisors is an integer number (9429867037).

Almost surely, 2^18859734073 is an apocalyptic number.

It is an amenable number.

18859734073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18859734073 is an equidigital number, since it uses as much as digits as its factorization.

18859734073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 18859734073 in words is "eighteen billion, eight hundred fifty-nine million, seven hundred thirty-four thousand, seventy-three".