18585876947 has 4 divisors (see below), whose sum is σ = 20275502136. Its totient is φ = 16896251760.

The previous prime is 18585876929. The next prime is 18585876949. The reversal of 18585876947 is 74967858581.

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

It is a cyclic number.

It is not a de Polignac number, because 18585876947 - 2⁸ = 18585876691 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18585876949) 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, 844812578 + ... + 844812599.

It is an arithmetic number, because the mean of its divisors is an integer number (5068875534).

Almost surely, 2^18585876947 is an apocalyptic number.

18585876947 is a deficient number, since it is larger than the sum of its proper divisors (1689625189).

18585876947 is a wasteful number, since it uses less digits than its factorization.

18585876947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689625188.

The product of its digits is 135475200, while the sum is 68.

The spelling of 18585876947 in words is "eighteen billion, five hundred eighty-five million, eight hundred seventy-six thousand, nine hundred forty-seven".