20100100009 has 12 divisors (see below), whose sum is σ = 22141278208. Its totient is φ = 18233301240.

The previous prime is 20100099997. The next prime is 20100100037. The reversal of 20100100009 is 90000100102.

It is not a de Polignac number, because 20100100009 - 2⁹ = 20100099497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100100049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123369 + ... + 235414.

Almost surely, 2^20100100009 is an apocalyptic number.

It is an amenable number.

20100100009 is a deficient number, since it is larger than the sum of its proper divisors (2041178199).

20100100009 is a wasteful number, since it uses less digits than its factorization.

20100100009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359268 (or 359257 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The spelling of 20100100009 in words is "twenty billion, one hundred million, one hundred thousand, nine".