16001818 has 16 divisors (see below), whose sum is σ = 27566784. Its totient is φ = 6824160.

The previous prime is 16001809. The next prime is 16001827. The reversal of 16001818 is 81810061.

It is a happy number.

16001818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16001809) and next prime (16001827).

16001818 is a modest number, since divided by 1818 gives 1600 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 16001792 and 16001801.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246 + ... + 5662.

It is an arithmetic number, because the mean of its divisors is an integer number (1722924).

Almost surely, 2^16001818 is an apocalyptic number.

16001818 is a deficient number, since it is larger than the sum of its proper divisors (11564966).

16001818 is a wasteful number, since it uses less digits than its factorization.

16001818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5637.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 16001818 is about 4000.2272435450. The cubic root of 16001818 is about 251.9937535195.

Adding to 16001818 its reverse (81810061), we get a palindrome (97811879).

The spelling of 16001818 in words is "sixteen million, one thousand, eight hundred eighteen".