16623453 has 16 divisors (see below), whose sum is σ = 27634176. Its totient is φ = 8635440.

The previous prime is 16623449. The next prime is 16623463. The reversal of 16623453 is 35432661.

It is not a de Polignac number, because 16623453 - 2² = 16623449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16623453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16623403) 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 15 ways as a sum of consecutive naturals, for example, 35751 + ... + 36212.

It is an arithmetic number, because the mean of its divisors is an integer number (1727136).

Almost surely, 2^16623453 is an apocalyptic number.

It is an amenable number.

16623453 is a deficient number, since it is larger than the sum of its proper divisors (11010723).

16623453 is a wasteful number, since it uses less digits than its factorization.

16623453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71984.

The product of its digits is 12960, while the sum is 30.

The square root of 16623453 is about 4077.1868978500. The cubic root of 16623453 is about 255.2155194504.

It can be divided in two parts, 1662 and 3453, that added together give a palindrome (5115).

The spelling of 16623453 in words is "sixteen million, six hundred twenty-three thousand, four hundred fifty-three".