18019996 has 12 divisors (see below), whose sum is σ = 31573080. Its totient is φ = 8999120.

The previous prime is 18019993. The next prime is 18020011. The reversal of 18019996 is 69991081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18019993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866 + ... + 6286.

It is an arithmetic number, because the mean of its divisors is an integer number (2631090).

Almost surely, 2^18019996 is an apocalyptic number.

It is an amenable number.

18019996 is a deficient number, since it is larger than the sum of its proper divisors (13553084).

18019996 is a wasteful number, since it uses less digits than its factorization.

18019996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5444 (or 5442 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 18019996 is about 4244.9965842154. The cubic root of 18019996 is about 262.1711485908.

The spelling of 18019996 in words is "eighteen million, nineteen thousand, nine hundred ninety-six".