16320423 has 16 divisors (see below), whose sum is σ = 24926720. Its totient is φ = 9304416.

The previous prime is 16320413. The next prime is 16320431. The reversal of 16320423 is 32402361.

It is a happy number.

It is not a de Polignac number, because 16320423 - 2⁹ = 16319911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 16320423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16320413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14733 + ... + 15801.

It is an arithmetic number, because the mean of its divisors is an integer number (1557920).

Almost surely, 2^16320423 is an apocalyptic number.

16320423 is a deficient number, since it is larger than the sum of its proper divisors (8606297).

16320423 is a wasteful number, since it uses less digits than its factorization.

16320423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 16320423 is about 4039.8543290569. The cubic root of 16320423 is about 253.6552196840.

Adding to 16320423 its reverse (32402361), we get a palindrome (48722784).

The spelling of 16320423 in words is "sixteen million, three hundred twenty thousand, four hundred twenty-three".