18446400001 has 8 divisors (see below), whose sum is σ = 19822998240. Its totient is φ = 17102192448.

The previous prime is 18446399833. The next prime is 18446400013. The reversal of 18446400001 is 10000464481.

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

It is a cyclic number.

It is not a de Polignac number, because 18446400001 - 2¹⁹ = 18445875713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18446400031) by changing a digit.

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, 8096491 + ... + 8098768.

It is an arithmetic number, because the mean of its divisors is an integer number (2477874780).

Almost surely, 2^18446400001 is an apocalyptic number.

It is an amenable number.

18446400001 is a deficient number, since it is larger than the sum of its proper divisors (1376598239).

18446400001 is a wasteful number, since it uses less digits than its factorization.

18446400001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16195343.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 18446400001 its reverse (10000464481), we get a palindrome (28446864482).

The spelling of 18446400001 in words is "eighteen billion, four hundred forty-six million, four hundred thousand, one".