18061523866 has 8 divisors (see below), whose sum is σ = 27147918240. Its totient is φ = 9012217788.

The previous prime is 18061523863. The next prime is 18061523873. The reversal of 18061523866 is 66832516081.

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

It is not an unprimeable number, because it can be changed into a prime (18061523863) 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, 9270856 + ... + 9272803.

It is an arithmetic number, because the mean of its divisors is an integer number (3393489780).

Almost surely, 2^18061523866 is an apocalyptic number.

18061523866 is a deficient number, since it is larger than the sum of its proper divisors (9086394374).

18061523866 is a wasteful number, since it uses less digits than its factorization.

18061523866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18544148.

The product of its (nonzero) digits is 414720, while the sum is 46.

The spelling of 18061523866 in words is "eighteen billion, sixty-one million, five hundred twenty-three thousand, eight hundred sixty-six".