18090773 has 2 divisors, whose sum is σ = 18090774. Its totient is φ = 18090772.

The previous prime is 18090749. The next prime is 18090797. The reversal of 18090773 is 37709081.

It is a balanced prime because it is at equal distance from previous prime (18090749) and next prime (18090797).

It can be written as a sum of positive squares in only one way, i.e., 11444689 + 6646084 = 3383^2 + 2578^2 .

It is an emirp because it is prime and its reverse (37709081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18090773 - 2⁸ = 18090517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18090733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9045386 + 9045387.

It is an arithmetic number, because the mean of its divisors is an integer number (9045387).

Almost surely, 2^18090773 is an apocalyptic number.

It is an amenable number.

18090773 is a deficient number, since it is larger than the sum of its proper divisors (1).

18090773 is an equidigital number, since it uses as much as digits as its factorization.

18090773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 18090773 is about 4253.3249346835. The cubic root of 18090773 is about 262.5139427212.

The spelling of 18090773 in words is "eighteen million, ninety thousand, seven hundred seventy-three".