16620443 has 8 divisors (see below), whose sum is σ = 19020000. Its totient is φ = 14227200.

The previous prime is 16620431. The next prime is 16620449. The reversal of 16620443 is 34402661.

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 16620443 - 2¹⁴ = 16604059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16620449) 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, 7793 + ... + 9693.

It is an arithmetic number, because the mean of its divisors is an integer number (2377500).

Almost surely, 2^16620443 is an apocalyptic number.

16620443 is a deficient number, since it is larger than the sum of its proper divisors (2399557).

16620443 is a wasteful number, since it uses less digits than its factorization.

16620443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 16620443 is about 4076.8177540822. The cubic root of 16620443 is about 255.2001146067.

The spelling of 16620443 in words is "sixteen million, six hundred twenty thousand, four hundred forty-three".