1818303941 has 2 divisors, whose sum is σ = 1818303942. Its totient is φ = 1818303940.

The previous prime is 1818303931. The next prime is 1818303959. The reversal of 1818303941 is 1493038181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1676574916 + 141729025 = 40946^2 + 11905^2 .

It is an emirp because it is prime and its reverse (1493038181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1818303941 - 2²⁶ = 1751195077 is a prime.

It is a super-2 number, since 2×1818303941² = 6612458443712262962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1818303895 and 1818303904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1818303911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909151970 + 909151971.

It is an arithmetic number, because the mean of its divisors is an integer number (909151971).

Almost surely, 2^1818303941 is an apocalyptic number.

It is an amenable number.

1818303941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818303941 is an equidigital number, since it uses as much as digits as its factorization.

1818303941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1818303941 is about 42641.5752640542. The cubic root of 1818303941 is about 1220.5497703593.

The spelling of 1818303941 in words is "one billion, eight hundred eighteen million, three hundred three thousand, nine hundred forty-one".