16473636921 has 8 divisors (see below), whose sum is σ = 25102684864. Its totient is φ = 9413506800.

The previous prime is 16473636917. The next prime is 16473636923. The reversal of 16473636921 is 12963637461.

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

It is not a de Polignac number, because 16473636921 - 2² = 16473636917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16473636923) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 392229430 + ... + 392229471.

It is an arithmetic number, because the mean of its divisors is an integer number (3137835608).

Almost surely, 2^16473636921 is an apocalyptic number.

It is an amenable number.

16473636921 is a deficient number, since it is larger than the sum of its proper divisors (8629047943).

16473636921 is an equidigital number, since it uses as much as digits as its factorization.

16473636921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784458911.

The product of its digits is 979776, while the sum is 48.

The spelling of 16473636921 in words is "sixteen billion, four hundred seventy-three million, six hundred thirty-six thousand, nine hundred twenty-one".