18166402444 has 12 divisors (see below), whose sum is σ = 32226700744. Its totient is φ = 8958773664.

The previous prime is 18166402391. The next prime is 18166402481. The reversal of 18166402444 is 44420466181.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18166402397 and 18166402406.

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 3 ways as a sum of consecutive naturals, for example, 31106562 + ... + 31107145.

Almost surely, 2^18166402444 is an apocalyptic number.

It is an amenable number.

18166402444 is a deficient number, since it is larger than the sum of its proper divisors (14060298300).

18166402444 is a wasteful number, since it uses less digits than its factorization.

18166402444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62213784 (or 62213782 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 18166402444 in words is "eighteen billion, one hundred sixty-six million, four hundred two thousand, four hundred forty-four".