18073816 has 16 divisors (see below), whose sum is σ = 34239240. Its totient is φ = 8943360.

The previous prime is 18073813. The next prime is 18073819. The reversal of 18073816 is 61837081.

It is an interprime number because it is at equal distance from previous prime (18073813) and next prime (18073819).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18073813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10870 + ... + 12421.

Almost surely, 2^18073816 is an apocalyptic number.

It is an amenable number.

18073816 is a deficient number, since it is larger than the sum of its proper divisors (16165424).

18073816 is a wasteful number, since it uses less digits than its factorization.

18073816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23394 (or 23390 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 18073816 is about 4251.3310856719. The cubic root of 18073816 is about 262.4318964672.

The spelling of 18073816 in words is "eighteen million, seventy-three thousand, eight hundred sixteen".