18706447801 has 2 divisors, whose sum is σ = 18706447802. Its totient is φ = 18706447800.

The previous prime is 18706447789. The next prime is 18706447829. The reversal of 18706447801 is 10874460781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10687424400 + 8019023401 = 103380^2 + 89549^2 .

It is a cyclic number.

It is not a de Polignac number, because 18706447801 - 2¹⁹ = 18705923513 is a prime.

It is not a weakly prime, because it can be changed into another prime (18706447871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9353223900 + 9353223901.

It is an arithmetic number, because the mean of its divisors is an integer number (9353223901).

Almost surely, 2^18706447801 is an apocalyptic number.

It is an amenable number.

18706447801 is a deficient number, since it is larger than the sum of its proper divisors (1).

18706447801 is an equidigital number, since it uses as much as digits as its factorization.

18706447801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 46.

The spelling of 18706447801 in words is "eighteen billion, seven hundred six million, four hundred forty-seven thousand, eight hundred one".