16421303 has 8 divisors (see below), whose sum is σ = 17857872. Its totient is φ = 15037056.

The previous prime is 16421299. The next prime is 16421323. The reversal of 16421303 is 30312461.

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 16421303 - 2² = 16421299 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 (16421323) 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, 12425 + ... + 13682.

It is an arithmetic number, because the mean of its divisors is an integer number (2232234).

Almost surely, 2^16421303 is an apocalyptic number.

16421303 is a deficient number, since it is larger than the sum of its proper divisors (1436569).

16421303 is a wasteful number, since it uses less digits than its factorization.

16421303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26161.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 16421303 is about 4052.3206931338. The cubic root of 16421303 is about 254.1767787908.

Adding to 16421303 its reverse (30312461), we get a palindrome (46733764).

The spelling of 16421303 in words is "sixteen million, four hundred twenty-one thousand, three hundred three".