18030016 has 14 divisors (see below), whose sum is σ = 35778440. Its totient is φ = 9014976.

The previous prime is 18029971. The next prime is 18030041. The reversal of 18030016 is 61003081.

It is a junction number, because it is equal to n+sod(n) for n = 18029975 and 18030002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140796 + ... + 140923.

Almost surely, 2^18030016 is an apocalyptic number.

18030016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18030016 is a deficient number, since it is larger than the sum of its proper divisors (17748424).

18030016 is an equidigital number, since it uses as much as digits as its factorization.

18030016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281731 (or 281721 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 18030016 is about 4246.1766331607. The cubic root of 18030016 is about 262.2197329182.

Adding to 18030016 its reverse (61003081), we get a palindrome (79033097).

The spelling of 18030016 in words is "eighteen million, thirty thousand, sixteen".