16220603 has 4 divisors (see below), whose sum is σ = 18537840. Its totient is φ = 13903368.

The previous prime is 16220563. The next prime is 16220609. The reversal of 16220603 is 30602261.

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

It is a cyclic number.

It is not a de Polignac number, because 16220603 - 2⁶ = 16220539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16220609) 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, 1158608 + ... + 1158621.

It is an arithmetic number, because the mean of its divisors is an integer number (4634460).

Almost surely, 2^16220603 is an apocalyptic number.

16220603 is a deficient number, since it is larger than the sum of its proper divisors (2317237).

16220603 is an equidigital number, since it uses as much as digits as its factorization.

16220603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317236.

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

The square root of 16220603 is about 4027.4809745050. The cubic root of 16220603 is about 253.1370210823.

Adding to 16220603 its reverse (30602261), we get a palindrome (46822864).

The spelling of 16220603 in words is "sixteen million, two hundred twenty thousand, six hundred three".