18859293057887 has 2 divisors, whose sum is σ = 18859293057888. Its totient is φ = 18859293057886.

The previous prime is 18859293057793. The next prime is 18859293057931. The reversal of 18859293057887 is 78875039295881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18859293057887 - 2³⁰ = 18858219316063 is a prime.

It is a super-2 number, since 2×18859293057887² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18859293057587) 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, 9429646528943 + 9429646528944.

It is an arithmetic number, because the mean of its divisors is an integer number (9429646528944).

Almost surely, 2^{18859293057887} is an apocalyptic number.

18859293057887 is a deficient number, since it is larger than the sum of its proper divisors (1).

18859293057887 is an equidigital number, since it uses as much as digits as its factorization.

18859293057887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2438553600, while the sum is 80.

The spelling of 18859293057887 in words is "eighteen trillion, eight hundred fifty-nine billion, two hundred ninety-three million, fifty-seven thousand, eight hundred eighty-seven".