18027720713 has 2 divisors, whose sum is σ = 18027720714. Its totient is φ = 18027720712.

The previous prime is 18027720677. The next prime is 18027720719. The reversal of 18027720713 is 31702772081.

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., 10485145609 + 7542575104 = 102397^2 + 86848^2 .

It is an emirp because it is prime and its reverse (31702772081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18027720713 - 2²⁶ = 17960611849 is a prime.

It is not a weakly prime, because it can be changed into another prime (18027720719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9013860356 + 9013860357.

It is an arithmetic number, because the mean of its divisors is an integer number (9013860357).

Almost surely, 2^18027720713 is an apocalyptic number.

It is an amenable number.

18027720713 is a deficient number, since it is larger than the sum of its proper divisors (1).

18027720713 is an equidigital number, since it uses as much as digits as its factorization.

18027720713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 38.

The spelling of 18027720713 in words is "eighteen billion, twenty-seven million, seven hundred twenty thousand, seven hundred thirteen".