18160816 has 20 divisors (see below), whose sum is σ = 35386624. Its totient is φ = 9028800.

The previous prime is 18160801. The next prime is 18160837. The reversal of 18160816 is 61806181.

It is a happy number.

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, 240 + ... + 6031.

Almost surely, 2^18160816 is an apocalyptic number.

18160816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18160816 is a deficient number, since it is larger than the sum of its proper divisors (17225808).

18160816 is a wasteful number, since it uses less digits than its factorization.

18160816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460 (or 6454 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 18160816 is about 4261.5508914009. The cubic root of 18160816 is about 262.8523027734.

Adding to 18160816 its reverse (61806181), we get a palindrome (79966997).

The spelling of 18160816 in words is "eighteen million, one hundred sixty thousand, eight hundred sixteen".