18083869 has 4 divisors (see below), whose sum is σ = 19147644. Its totient is φ = 17020096.

The previous prime is 18083851. The next prime is 18083873. The reversal of 18083869 is 96838081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15507844 + 2576025 = 3938^2 + 1605^2 .

It is a cyclic number.

It is not a de Polignac number, because 18083869 - 2⁹ = 18083357 is a prime.

It is a super-2 number, since 2×18083869² = 654052636018322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18083809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531862 + ... + 531895.

It is an arithmetic number, because the mean of its divisors is an integer number (4786911).

Almost surely, 2^18083869 is an apocalyptic number.

It is an amenable number.

18083869 is a deficient number, since it is larger than the sum of its proper divisors (1063775).

18083869 is a wasteful number, since it uses less digits than its factorization.

18083869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063774.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 18083869 is about 4252.5132568870. The cubic root of 18083869 is about 262.4805439851.

The spelling of 18083869 in words is "eighteen million, eighty-three thousand, eight hundred sixty-nine".