18666862141 has 2 divisors, whose sum is σ = 18666862142. Its totient is φ = 18666862140.

The previous prime is 18666862061. The next prime is 18666862157. The reversal of 18666862141 is 14126866681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18603596025 + 63266116 = 136395^2 + 7954^2 .

It is a cyclic number.

It is not a de Polignac number, because 18666862141 - 2²⁷ = 18532644413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18666862241) 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, 9333431070 + 9333431071.

It is an arithmetic number, because the mean of its divisors is an integer number (9333431071).

Almost surely, 2^18666862141 is an apocalyptic number.

It is an amenable number.

18666862141 is a deficient number, since it is larger than the sum of its proper divisors (1).

18666862141 is an equidigital number, since it uses as much as digits as its factorization.

18666862141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 49.

The spelling of 18666862141 in words is "eighteen billion, six hundred sixty-six million, eight hundred sixty-two thousand, one hundred forty-one".