18746471413 has 2 divisors, whose sum is σ = 18746471414. Its totient is φ = 18746471412.

The previous prime is 18746471411. The next prime is 18746471449. The reversal of 18746471413 is 31417464781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18415304209 + 331167204 = 135703^2 + 18198^2 .

It is a cyclic number.

It is not a de Polignac number, because 18746471413 - 2¹ = 18746471411 is a prime.

Together with 18746471411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18746471411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9373235706 + 9373235707.

It is an arithmetic number, because the mean of its divisors is an integer number (9373235707).

Almost surely, 2^18746471413 is an apocalyptic number.

It is an amenable number.

18746471413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18746471413 is an equidigital number, since it uses as much as digits as its factorization.

18746471413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 46.

The spelling of 18746471413 in words is "eighteen billion, seven hundred forty-six million, four hundred seventy-one thousand, four hundred thirteen".