47018386813 has 2 divisors, whose sum is σ = 47018386814. Its totient is φ = 47018386812.

The previous prime is 47018386799. The next prime is 47018386853. The reversal of 47018386813 is 31868381074.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38061278649 + 8957108164 = 195093^2 + 94642^2 .

It is a cyclic number.

It is not a de Polignac number, because 47018386813 - 2⁹ = 47018386301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47018386853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23509193406 + 23509193407.

It is an arithmetic number, because the mean of its divisors is an integer number (23509193407).

Almost surely, 2^47018386813 is an apocalyptic number.

It is an amenable number.

47018386813 is a deficient number, since it is larger than the sum of its proper divisors (1).

47018386813 is an equidigital number, since it uses as much as digits as its factorization.

47018386813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 47018386813 in words is "forty-seven billion, eighteen million, three hundred eighty-six thousand, eight hundred thirteen".