18827765365 has 8 divisors (see below), whose sum is σ = 22665503448. Its totient is φ = 15014088960.

The previous prime is 18827765291. The next prime is 18827765389. The reversal of 18827765365 is 56356772881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 250620561 + 18577144804 = 15831^2 + 136298^2 .

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

It is not a de Polignac number, because 18827765365 - 2⁹ = 18827764853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6013696 + ... + 6016825.

It is an arithmetic number, because the mean of its divisors is an integer number (2833187931).

Almost surely, 2^18827765365 is an apocalyptic number.

It is an amenable number.

18827765365 is a deficient number, since it is larger than the sum of its proper divisors (3837738083).

18827765365 is a wasteful number, since it uses less digits than its factorization.

18827765365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12030839.

The product of its digits is 16934400, while the sum is 58.

The spelling of 18827765365 in words is "eighteen billion, eight hundred twenty-seven million, seven hundred sixty-five thousand, three hundred sixty-five".