18934463413 has 2 divisors, whose sum is σ = 18934463414. Its totient is φ = 18934463412.

The previous prime is 18934463407. The next prime is 18934463441. The reversal of 18934463413 is 31436443981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9505665009 + 9428798404 = 97497^2 + 97102^2 .

It is a cyclic number.

It is not a de Polignac number, because 18934463413 - 2²¹ = 18932366261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18934464413) 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, 9467231706 + 9467231707.

It is an arithmetic number, because the mean of its divisors is an integer number (9467231707).

Almost surely, 2^18934463413 is an apocalyptic number.

It is an amenable number.

18934463413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18934463413 is an equidigital number, since it uses as much as digits as its factorization.

18934463413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 46.

The spelling of 18934463413 in words is "eighteen billion, nine hundred thirty-four million, four hundred sixty-three thousand, four hundred thirteen".