18561086870 has 16 divisors (see below), whose sum is σ = 33505693200. Its totient is φ = 7403159904.

The previous prime is 18561086813. The next prime is 18561086923. The reversal of 18561086870 is 7868016581.

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, 2655692 + ... + 2662671.

It is an arithmetic number, because the mean of its divisors is an integer number (2094105825).

Almost surely, 2^18561086870 is an apocalyptic number.

18561086870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18561086870 is a deficient number, since it is larger than the sum of its proper divisors (14944606330).

18561086870 is a wasteful number, since it uses less digits than its factorization.

18561086870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5318719.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 18561086870 in words is "eighteen billion, five hundred sixty-one million, eighty-six thousand, eight hundred seventy".