18399627437413 has 2 divisors, whose sum is σ = 18399627437414. Its totient is φ = 18399627437412.

The previous prime is 18399627437333. The next prime is 18399627437437. The reversal of 18399627437413 is 31473472699381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10157434307329 + 8242193130084 = 3187073^2 + 2870922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18399627437413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18399627437483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9199813718706 + 9199813718707.

It is an arithmetic number, because the mean of its divisors is an integer number (9199813718707).

Almost surely, 2^{18399627437413} is an apocalyptic number.

It is an amenable number.

18399627437413 is a deficient number, since it is larger than the sum of its proper divisors (1).

18399627437413 is an equidigital number, since it uses as much as digits as its factorization.

18399627437413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164602368, while the sum is 67.

The spelling of 18399627437413 in words is "eighteen trillion, three hundred ninety-nine billion, six hundred twenty-seven million, four hundred thirty-seven thousand, four hundred thirteen".