16423505 has 16 divisors (see below), whose sum is σ = 23710080. Its totient is φ = 10668672.

The previous prime is 16423501. The next prime is 16423531. The reversal of 16423505 is 50532461.

It is not a de Polignac number, because 16423505 - 2² = 16423501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16423501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11684 + ... + 13013.

It is an arithmetic number, because the mean of its divisors is an integer number (1481880).

Almost surely, 2^16423505 is an apocalyptic number.

It is an amenable number.

16423505 is a deficient number, since it is larger than the sum of its proper divisors (7286575).

16423505 is a wasteful number, since it uses less digits than its factorization.

16423505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24728.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 16423505 is about 4052.5923801932. The cubic root of 16423505 is about 254.1881394860.

Adding to 16423505 its reverse (50532461), we get a palindrome (66955966).

The spelling of 16423505 in words is "sixteen million, four hundred twenty-three thousand, five hundred five".