16500423 has 4 divisors (see below), whose sum is σ = 22000568. Its totient is φ = 11000280.

The previous prime is 16500413. The next prime is 16500427. The reversal of 16500423 is 32400561.

It is a happy number.

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

It is not a de Polignac number, because 16500423 - 2¹⁸ = 16238279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16500423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16500427) 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, 2750068 + ... + 2750073.

It is an arithmetic number, because the mean of its divisors is an integer number (5500142).

Almost surely, 2^16500423 is an apocalyptic number.

16500423 is a deficient number, since it is larger than the sum of its proper divisors (5500145).

16500423 is an equidigital number, since it uses as much as digits as its factorization.

16500423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500144.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 16500423 is about 4062.0712696850. The cubic root of 16500423 is about 254.5843439847.

Adding to 16500423 its reverse (32400561), we get a palindrome (48900984).

The spelling of 16500423 in words is "sixteen million, five hundred thousand, four hundred twenty-three".