16003816 has 16 divisors (see below), whose sum is σ = 30284100. Its totient is φ = 7928064.

The previous prime is 16003789. The next prime is 16003859. The reversal of 16003816 is 61830061.

16003816 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 2 ways, for example, as 15288100 + 715716 = 3910^2 + 846^2 .

It is a super-2 number, since 2×16003816² = 512244253123712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8305 + ... + 10048.

Almost surely, 2^16003816 is an apocalyptic number.

It is an amenable number.

16003816 is a deficient number, since it is larger than the sum of its proper divisors (14280284).

16003816 is a wasteful number, since it uses less digits than its factorization.

16003816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18468 (or 18464 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 16003816 is about 4000.4769715623. The cubic root of 16003816 is about 252.0042411313.

Adding to 16003816 its reverse (61830061), we get a palindrome (77833877).

The spelling of 16003816 in words is "sixteen million, three thousand, eight hundred sixteen".