18871859353 has 2 divisors, whose sum is σ = 18871859354. Its totient is φ = 18871859352.

The previous prime is 18871859339. The next prime is 18871859371. The reversal of 18871859353 is 35395817881.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18200168464 + 671690889 = 134908^2 + 25917^2 .

It is a cyclic number.

It is not a de Polignac number, because 18871859353 - 2²⁵ = 18838304921 is a prime.

It is a super-2 number, since 2×18871859353² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18871859453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9435929676 + 9435929677.

It is an arithmetic number, because the mean of its divisors is an integer number (9435929677).

Almost surely, 2^18871859353 is an apocalyptic number.

It is an amenable number.

18871859353 is a deficient number, since it is larger than the sum of its proper divisors (1).

18871859353 is an equidigital number, since it uses as much as digits as its factorization.

18871859353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7257600, while the sum is 58.

The spelling of 18871859353 in words is "eighteen billion, eight hundred seventy-one million, eight hundred fifty-nine thousand, three hundred fifty-three".