16673421 has 8 divisors (see below), whose sum is σ = 22832224. Its totient is φ = 10815120.

The previous prime is 16673401. The next prime is 16673491. The reversal of 16673421 is 12437661.

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

It is a de Polignac number, because none of the positive numbers 2^k-16673421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16673401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74995 + ... + 75216.

It is an arithmetic number, because the mean of its divisors is an integer number (2854028).

Almost surely, 2^16673421 is an apocalyptic number.

It is an amenable number.

16673421 is a deficient number, since it is larger than the sum of its proper divisors (6158803).

16673421 is a wasteful number, since it uses less digits than its factorization.

16673421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150251.

The product of its digits is 6048, while the sum is 30.

The square root of 16673421 is about 4083.3100543554. The cubic root of 16673421 is about 255.4709788665.

The spelling of 16673421 in words is "sixteen million, six hundred seventy-three thousand, four hundred twenty-one".