16461818 has 16 divisors (see below), whose sum is σ = 25547400. Its totient is φ = 7949376.

The previous prime is 16461817. The next prime is 16461829. The reversal of 16461818 is 81816461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15976009 + 485809 = 3997^2 + 697^2 .

16461818 is a modest number, since divided by 1818 gives 1646 as remainder.

It is not an unprimeable number, because it can be changed into a prime (16461811) 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, 10280 + ... + 11772.

Almost surely, 2^16461818 is an apocalyptic number.

16461818 is a deficient number, since it is larger than the sum of its proper divisors (9085582).

16461818 is a wasteful number, since it uses less digits than its factorization.

16461818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681.

The product of its digits is 9216, while the sum is 35.

The square root of 16461818 is about 4057.3166009076. The cubic root of 16461818 is about 254.3856439593.

The spelling of 16461818 in words is "sixteen million, four hundred sixty-one thousand, eight hundred eighteen".