18083773 has 4 divisors (see below), whose sum is σ = 18870048. Its totient is φ = 17297500.

The previous prime is 18083743. The next prime is 18083777. The reversal of 18083773 is 37738081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37738081 = 41 ⋅920441.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18083773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18083777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393103 + ... + 393148.

It is an arithmetic number, because the mean of its divisors is an integer number (4717512).

Almost surely, 2^18083773 is an apocalyptic number.

It is an amenable number.

18083773 is a deficient number, since it is larger than the sum of its proper divisors (786275).

18083773 is an equidigital number, since it uses as much as digits as its factorization.

18083773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786274.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 18083773 is about 4252.5019694293. The cubic root of 18083773 is about 262.4800795163.

The spelling of 18083773 in words is "eighteen million, eighty-three thousand, seven hundred seventy-three".