20003203002109 has 4 divisors (see below), whose sum is σ = 20021915073340. Its totient is φ = 19984490930880.

The previous prime is 20003203002061. The next prime is 20003203002191. The reversal of 20003203002109 is 90120030230002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13875647350009 + 6127555652100 = 3725003^2 + 2475390^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003203002109 - 2³¹ = 20001055518461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20003203002109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003203102109) 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, 9356034012 + ... + 9356036149.

It is an arithmetic number, because the mean of its divisors is an integer number (5005478768335).

Almost surely, 2^{20003203002109} is an apocalyptic number.

It is an amenable number.

20003203002109 is a deficient number, since it is larger than the sum of its proper divisors (18712071231).

20003203002109 is a wasteful number, since it uses less digits than its factorization.

20003203002109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18712071230.

The product of its (nonzero) digits is 648, while the sum is 22.

The spelling of 20003203002109 in words is "twenty trillion, three billion, two hundred three million, two thousand, one hundred nine".