16500138 has 16 divisors (see below), whose sum is σ = 33055776. Its totient is φ = 5490800.

The previous prime is 16500103. The next prime is 16500139. The reversal of 16500138 is 83100561.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16500139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2245 + ... + 6167.

It is an arithmetic number, because the mean of its divisors is an integer number (2065986).

Almost surely, 2^16500138 is an apocalyptic number.

16500138 is an abundant number, since it is smaller than the sum of its proper divisors (16555638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16500138 is a wasteful number, since it uses less digits than its factorization.

16500138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 16500138 is about 4062.0361889082. The cubic root of 16500138 is about 254.5828782252.

Adding to 16500138 its reverse (83100561), we get a palindrome (99600699).

The spelling of 16500138 in words is "sixteen million, five hundred thousand, one hundred thirty-eight".