18000919 has 2 divisors, whose sum is σ = 18000920. Its totient is φ = 18000918.

The previous prime is 18000901. The next prime is 18000937. The reversal of 18000919 is 91900081.

It is a balanced prime because it is at equal distance from previous prime (18000901) and next prime (18000937).

It is a cyclic number.

It is not a de Polignac number, because 18000919 - 2⁵ = 18000887 is a prime.

It is a super-2 number, since 2×18000919² = 648066169689122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18000949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9000459 + 9000460.

It is an arithmetic number, because the mean of its divisors is an integer number (9000460).

Almost surely, 2^18000919 is an apocalyptic number.

18000919 is a deficient number, since it is larger than the sum of its proper divisors (1).

18000919 is an equidigital number, since it uses as much as digits as its factorization.

18000919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 18000919 is about 4242.7489909256. The cubic root of 18000919 is about 262.0785994586.

The spelling of 18000919 in words is "eighteen million, nine hundred nineteen", and thus it is an aban number.