1818055919 has 2 divisors, whose sum is σ = 1818055920. Its totient is φ = 1818055918.

The previous prime is 1818055901. The next prime is 1818055931. The reversal of 1818055919 is 9195508181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1818055919 - 2²⁸ = 1549620463 is a prime.

It is a super-2 number, since 2×1818055919² = 6610654649221869122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1818055949) 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, 909027959 + 909027960.

It is an arithmetic number, because the mean of its divisors is an integer number (909027960).

Almost surely, 2^1818055919 is an apocalyptic number.

1818055919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818055919 is an equidigital number, since it uses as much as digits as its factorization.

1818055919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 47.

The square root of 1818055919 is about 42638.6669467984. Note that the first 3 decimals coincide. The cubic root of 1818055919 is about 1220.4942723109.

The spelling of 1818055919 in words is "one billion, eight hundred eighteen million, fifty-five thousand, nine hundred nineteen".