99181806 has 8 divisors (see below), whose sum is σ = 198363624. Its totient is φ = 33060600.

The previous prime is 99181787. The next prime is 99181807. The reversal of 99181806 is 60818199.

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

99181806 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99181807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8265145 + ... + 8265156.

It is an arithmetic number, because the mean of its divisors is an integer number (24795453).

Almost surely, 2^99181806 is an apocalyptic number.

99181806 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.

99181806 is a wasteful number, since it uses less digits than its factorization.

99181806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16530306.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 99181806 is about 9959.0062757285. The cubic root of 99181806 is about 462.8895083460.

The spelling of 99181806 in words is "ninety-nine million, one hundred eighty-one thousand, eight hundred six".