10020009999 has 32 divisors (see below), whose sum is σ = 14047037440. Its totient is φ = 6344956800.

The previous prime is 10020009949. The next prime is 10020010019. The reversal of 10020009999 is 99990002001.

It is a happy number.

10020009999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 100100²-1.

It is not a de Polignac number, because 10020009999 - 2⁹ = 10020009487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020009949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3101517 + ... + 3104745.

It is an arithmetic number, because the mean of its divisors is an integer number (438969920).

Almost surely, 2^10020009999 is an apocalyptic number.

10020009999 is a deficient number, since it is larger than the sum of its proper divisors (4027027441).

10020009999 is a wasteful number, since it uses less digits than its factorization.

10020009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871.

The product of its (nonzero) digits is 13122, while the sum is 39.

The spelling of 10020009999 in words is "ten billion, twenty million, nine thousand, nine hundred ninety-nine".