18862086209 has 4 divisors (see below), whose sum is σ = 19056540804. Its totient is φ = 18667631616.

The previous prime is 18862086179. The next prime is 18862086223. The reversal of 18862086209 is 90268026881.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8784937984 + 10077148225 = 93728^2 + 100385^2 .

It is a cyclic number.

It is not a de Polignac number, because 18862086209 - 2³² = 14567118913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18862086259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97227152 + ... + 97227345.

It is an arithmetic number, because the mean of its divisors is an integer number (4764135201).

Almost surely, 2^18862086209 is an apocalyptic number.

It is an amenable number.

18862086209 is a deficient number, since it is larger than the sum of its proper divisors (194454595).

18862086209 is an equidigital number, since it uses as much as digits as its factorization.

18862086209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194454594.

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 18862086209 in words is "eighteen billion, eight hundred sixty-two million, eighty-six thousand, two hundred nine".