16500500 has 48 divisors (see below), whose sum is σ = 36695568. Its totient is φ = 6480000.

The previous prime is 16500481. The next prime is 16500527. The reversal of 16500500 is 500561.

It can be written as a sum of positive squares in 8 ways, for example, as 11062276 + 5438224 = 3326^2 + 2332^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30230 + ... + 30770.

It is an arithmetic number, because the mean of its divisors is an integer number (764491).

Almost surely, 2^16500500 is an apocalyptic number.

16500500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16500500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18347784).

16500500 is an abundant number, since it is smaller than the sum of its proper divisors (20195068).

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

16500500 is a wasteful number, since it uses less digits than its factorization.

16500500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 16500500 is about 4062.0807475972. The cubic root of 16500500 is about 254.5847399941.

The spelling of 16500500 in words is "sixteen million, five hundred thousand, five hundred".