18128996 has 18 divisors (see below), whose sum is σ = 32091318. Its totient is φ = 8961120.

The previous prime is 18128993. The next prime is 18129071. The reversal of 18128996 is 69982181.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 1612900 = 4064^2 + 1270^2 .

It is not an unprimeable number, because it can be changed into a prime (18128993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64376 + ... + 64656.

It is an arithmetic number, because the mean of its divisors is an integer number (1782851).

Almost surely, 2^18128996 is an apocalyptic number.

It is an amenable number.

18128996 is a deficient number, since it is larger than the sum of its proper divisors (13962322).

18128996 is a wasteful number, since it uses less digits than its factorization.

18128996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 410 counting only the distinct ones).

The product of its digits is 62208, while the sum is 44.

The square root of 18128996 is about 4257.8158720170. The cubic root of 18128996 is about 262.6986964242.

The spelling of 18128996 in words is "eighteen million, one hundred twenty-eight thousand, nine hundred ninety-six".