99820012 has 6 divisors (see below), whose sum is σ = 174685028. Its totient is φ = 49910004.

The previous prime is 99820009. The next prime is 99820051. The reversal of 99820012 is 21002899.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12477498 + ... + 12477505.

Almost surely, 2^99820012 is an apocalyptic number.

It is an amenable number.

99820012 is a deficient number, since it is larger than the sum of its proper divisors (74865016).

99820012 is a wasteful number, since it uses less digits than its factorization.

99820012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24955007 (or 24955005 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 99820012 is about 9990.9965468916. The cubic root of 99820012 is about 463.8802393554.

The spelling of 99820012 in words is "ninety-nine million, eight hundred twenty thousand, twelve".