18471781706 has 16 divisors (see below), whose sum is σ = 32687393280. Its totient is φ = 7661107440.

The previous prime is 18471781663. The next prime is 18471781711. The reversal of 18471781706 is 60718717481.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21280421 + ... + 21281288.

It is an arithmetic number, because the mean of its divisors is an integer number (2042962080).

Almost surely, 2^18471781706 is an apocalyptic number.

18471781706 is a deficient number, since it is larger than the sum of its proper divisors (14215611574).

18471781706 is a wasteful number, since it uses less digits than its factorization.

18471781706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42561749.

The product of its (nonzero) digits is 526848, while the sum is 50.

The spelling of 18471781706 in words is "eighteen billion, four hundred seventy-one million, seven hundred eighty-one thousand, seven hundred six".