18840645367 has 2 divisors, whose sum is σ = 18840645368. Its totient is φ = 18840645366.

The previous prime is 18840645337. The next prime is 18840645389. The reversal of 18840645367 is 76354604881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18840645367 - 2²³ = 18832256759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18840645337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9420322683 + 9420322684.

It is an arithmetic number, because the mean of its divisors is an integer number (9420322684).

Almost surely, 2^18840645367 is an apocalyptic number.

18840645367 is a deficient number, since it is larger than the sum of its proper divisors (1).

18840645367 is an equidigital number, since it uses as much as digits as its factorization.

18840645367 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 18840645367 in words is "eighteen billion, eight hundred forty million, six hundred forty-five thousand, three hundred sixty-seven".