18282645224021 has 2 divisors, whose sum is σ = 18282645224022. Its totient is φ = 18282645224020.

The previous prime is 18282645223937. The next prime is 18282645224069. The reversal of 18282645224021 is 12042254628281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14191147888996 + 4091497335025 = 3767114^2 + 2022745^2 .

It is a cyclic number.

It is not a de Polignac number, because 18282645224021 - 2¹⁰ = 18282645222997 is a prime.

It is a super-3 number, since 3×18282645224021³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18282645224321) 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, 9141322612010 + 9141322612011.

It is an arithmetic number, because the mean of its divisors is an integer number (9141322612011).

Almost surely, 2^{18282645224021} is an apocalyptic number.

It is an amenable number.

18282645224021 is a deficient number, since it is larger than the sum of its proper divisors (1).

18282645224021 is an equidigital number, since it uses as much as digits as its factorization.

18282645224021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 983040, while the sum is 47.

The spelling of 18282645224021 in words is "eighteen trillion, two hundred eighty-two billion, six hundred forty-five million, two hundred twenty-four thousand, twenty-one".