16004500 has 24 divisors (see below), whose sum is σ = 34954920. Its totient is φ = 6401600.

The previous prime is 16004489. The next prime is 16004501. The reversal of 16004500 is 540061.

16004500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5008644 + 10995856 = 2238^2 + 3316^2 .

It is a super-2 number, since 2×16004500² = 512288040500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16004501) 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, 15505 + ... + 16504.

It is an arithmetic number, because the mean of its divisors is an integer number (1456455).

Almost surely, 2^16004500 is an apocalyptic number.

16004500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16004500 is an abundant number, since it is smaller than the sum of its proper divisors (18950420).

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

16004500 is a wasteful number, since it uses less digits than its factorization.

16004500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32028 (or 32016 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 16004500 is about 4000.5624604548. The cubic root of 16004500 is about 252.0078312843.

Adding to 16004500 its reverse (540061), we get a palindrome (16544561).

It can be divided in two parts, 16004 and 500, that multiplied together give a triangular number (8002000 = T₄₀₀₀).

The spelling of 16004500 in words is "sixteen million, four thousand, five hundred".