20001103209 has 48 divisors (see below), whose sum is σ = 31398292224. Its totient is φ = 12234499200.

The previous prime is 20001103193. The next prime is 20001103247. The reversal of 20001103209 is 90230110002.

It is a happy number.

It is not a de Polignac number, because 20001103209 - 2⁴ = 20001103193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001103191 and 20001103200.

It is not an unprimeable number, because it can be changed into a prime (20001103259) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 525399 + ... + 562179.

It is an arithmetic number, because the mean of its divisors is an integer number (654131088).

Almost surely, 2^20001103209 is an apocalyptic number.

It is an amenable number.

20001103209 is a deficient number, since it is larger than the sum of its proper divisors (11397189015).

20001103209 is a wasteful number, since it uses less digits than its factorization.

20001103209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36918 (or 36915 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The spelling of 20001103209 in words is "twenty billion, one million, one hundred three thousand, two hundred nine".