1821046418089 has 2 divisors, whose sum is σ = 1821046418090. Its totient is φ = 1821046418088.

The previous prime is 1821046418063. The next prime is 1821046418119. The reversal of 1821046418089 is 9808146401281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1591150142464 + 229896275625 = 1261408^2 + 479475^2 .

It is an emirp because it is prime and its reverse (9808146401281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1821046418089 - 2¹⁵ = 1821046385321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1821046418689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910523209044 + 910523209045.

It is an arithmetic number, because the mean of its divisors is an integer number (910523209045).

Almost surely, 2^{1821046418089} is an apocalyptic number.

It is an amenable number.

1821046418089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1821046418089 is an equidigital number, since it uses as much as digits as its factorization.

1821046418089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 884736, while the sum is 52.

The spelling of 1821046418089 in words is "one trillion, eight hundred twenty-one billion, forty-six million, four hundred eighteen thousand, eighty-nine".