18131896166 has 8 divisors (see below), whose sum is σ = 27658824840. Its totient is φ = 8912287888.

The previous prime is 18131896109. The next prime is 18131896207. The reversal of 18131896166 is 66169813181.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76829951 + ... + 76830186.

It is an arithmetic number, because the mean of its divisors is an integer number (3457353105).

Almost surely, 2^18131896166 is an apocalyptic number.

18131896166 is a deficient number, since it is larger than the sum of its proper divisors (9526928674).

18131896166 is a wasteful number, since it uses less digits than its factorization.

18131896166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153660198.

The product of its digits is 373248, while the sum is 50.

The spelling of 18131896166 in words is "eighteen billion, one hundred thirty-one million, eight hundred ninety-six thousand, one hundred sixty-six".