18083987365 has 8 divisors (see below), whose sum is σ = 21750904728. Its totient is φ = 14433776640.

The previous prime is 18083987357. The next prime is 18083987413. The reversal of 18083987365 is 56378938081.

It can be written as a sum of positive squares in 4 ways, for example, as 1150430724 + 16933556641 = 33918^2 + 130129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18083987365 - 2³ = 18083987357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4174276 + ... + 4178605.

It is an arithmetic number, because the mean of its divisors is an integer number (2718863091).

Almost surely, 2^18083987365 is an apocalyptic number.

It is an amenable number.

18083987365 is a deficient number, since it is larger than the sum of its proper divisors (3666917363).

18083987365 is an equidigital number, since it uses as much as digits as its factorization.

18083987365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8353319.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 18083987365 in words is "eighteen billion, eighty-three million, nine hundred eighty-seven thousand, three hundred sixty-five".