18787049065 has 8 divisors (see below), whose sum is σ = 22709017800. Its totient is φ = 14919933312.

The previous prime is 18787049059. The next prime is 18787049077. The reversal of 18787049065 is 56094078781.

It can be written as a sum of positive squares in 4 ways, for example, as 20241001 + 18766808064 = 4499^2 + 136992^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18787049065 - 2¹¹ = 18787047017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18787048997 and 18787049015.

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, 13712490 + ... + 13713859.

It is an arithmetic number, because the mean of its divisors is an integer number (2838627225).

Almost surely, 2^18787049065 is an apocalyptic number.

It is an amenable number.

18787049065 is a deficient number, since it is larger than the sum of its proper divisors (3921968735).

18787049065 is a wasteful number, since it uses less digits than its factorization.

18787049065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27426491.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 18787049065 in words is "eighteen billion, seven hundred eighty-seven million, forty-nine thousand, sixty-five".