18341426387 has 2 divisors, whose sum is σ = 18341426388. Its totient is φ = 18341426386.

The previous prime is 18341426359. The next prime is 18341426393. The reversal of 18341426387 is 78362414381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18341426387 - 2³⁰ = 17267684563 is a prime.

It is not a weakly prime, because it can be changed into another prime (18341426317) 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, 9170713193 + 9170713194.

It is an arithmetic number, because the mean of its divisors is an integer number (9170713194).

Almost surely, 2^18341426387 is an apocalyptic number.

18341426387 is a deficient number, since it is larger than the sum of its proper divisors (1).

18341426387 is an equidigital number, since it uses as much as digits as its factorization.

18341426387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 47.

The spelling of 18341426387 in words is "eighteen billion, three hundred forty-one million, four hundred twenty-six thousand, three hundred eighty-seven".