18161796 has 24 divisors (see below), whose sum is σ = 44608480. Its totient is φ = 5735232.

The previous prime is 18161791. The next prime is 18161807. The reversal of 18161796 is 69716181.

It is not an unprimeable number, because it can be changed into a prime (18161791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39601 + ... + 40056.

Almost surely, 2^18161796 is an apocalyptic number.

It is an amenable number.

18161796 is an abundant number, since it is smaller than the sum of its proper divisors (26446684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18161796 is a wasteful number, since it uses less digits than its factorization.

18161796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79683 (or 79681 counting only the distinct ones).

The product of its digits is 18144, while the sum is 39.

The square root of 18161796 is about 4261.6658714639. The cubic root of 18161796 is about 262.8570307295.

The spelling of 18161796 in words is "eighteen million, one hundred sixty-one thousand, seven hundred ninety-six".