18241899773 has 2 divisors, whose sum is σ = 18241899774. Its totient is φ = 18241899772.

The previous prime is 18241899763. The next prime is 18241899853. The reversal of 18241899773 is 37799814281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16129762009 + 2112137764 = 127003^2 + 45958^2 .

It is a cyclic number.

It is not a de Polignac number, because 18241899773 - 2⁸ = 18241899517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18241899713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9120949886 + 9120949887.

It is an arithmetic number, because the mean of its divisors is an integer number (9120949887).

Almost surely, 2^18241899773 is an apocalyptic number.

It is an amenable number.

18241899773 is a deficient number, since it is larger than the sum of its proper divisors (1).

18241899773 is an equidigital number, since it uses as much as digits as its factorization.

18241899773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 59.

The spelling of 18241899773 in words is "eighteen billion, two hundred forty-one million, eight hundred ninety-nine thousand, seven hundred seventy-three".