18196806 has 8 divisors (see below), whose sum is σ = 36393624. Its totient is φ = 6065600.

The previous prime is 18196799. The next prime is 18196807. The reversal of 18196806 is 60869181.

It is a sphenic number, since it is the product of 3 distinct primes.

18196806 is an admirable number.

It is a super-2 number, since 2×18196806² = 662247497203272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18196807) 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, 1516395 + ... + 1516406.

It is an arithmetic number, because the mean of its divisors is an integer number (4549203).

Almost surely, 2^18196806 is an apocalyptic number.

18196806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18196806 is a wasteful number, since it uses less digits than its factorization.

18196806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032806.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 18196806 is about 4265.7714425412. The cubic root of 18196806 is about 263.0258230992.

The spelling of 18196806 in words is "eighteen million, one hundred ninety-six thousand, eight hundred six".