18486546985 has 8 divisors (see below), whose sum is σ = 22783420296. Its totient is φ = 14389528320.

The previous prime is 18486546959. The next prime is 18486547007. The reversal of 18486546985 is 58964568481.

It can be written as a sum of positive squares in 4 ways, for example, as 9792289936 + 8694257049 = 98956^2 + 93243^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-18486546985 is a prime.

It is a super-2 number, since 2×18486546985² (a number of 21 digits) contains 22 as substring.

It is a Duffinian 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, 49963456 + ... + 49963825.

It is an arithmetic number, because the mean of its divisors is an integer number (2847927537).

Almost surely, 2^18486546985 is an apocalyptic number.

It is an amenable number.

18486546985 is a deficient number, since it is larger than the sum of its proper divisors (4296873311).

18486546985 is an equidigital number, since it uses as much as digits as its factorization.

18486546985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99927323.

The product of its digits is 66355200, while the sum is 64.

The spelling of 18486546985 in words is "eighteen billion, four hundred eighty-six million, five hundred forty-six thousand, nine hundred eighty-five".