16620103 has 4 divisors (see below), whose sum is σ = 17193240. Its totient is φ = 16046968.

The previous prime is 16620049. The next prime is 16620119. The reversal of 16620103 is 30102661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16620103 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 (16620143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286525 + ... + 286582.

It is an arithmetic number, because the mean of its divisors is an integer number (4298310).

Almost surely, 2^16620103 is an apocalyptic number.

16620103 is a deficient number, since it is larger than the sum of its proper divisors (573137).

16620103 is an equidigital number, since it uses as much as digits as its factorization.

16620103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573136.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 16620103 is about 4076.7760546785. The cubic root of 16620103 is about 255.1983744078.

Adding to 16620103 its reverse (30102661), we get a palindrome (46722764).

The spelling of 16620103 in words is "sixteen million, six hundred twenty thousand, one hundred three".