20013311209 has 8 divisors (see below), whose sum is σ = 20446806152. Its totient is φ = 19583216640.

The previous prime is 20013311207. The next prime is 20013311221. The reversal of 20013311209 is 90211331002.

It can be written as a sum of positive squares in 4 ways, for example, as 1258830400 + 18754480809 = 35480^2 + 136947^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20013311209 - 2¹ = 20013311207 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 20013311209.

It is not an unprimeable number, because it can be changed into a prime (20013311203) 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 7 ways as a sum of consecutive naturals, for example, 838194 + ... + 861739.

It is an arithmetic number, because the mean of its divisors is an integer number (2555850769).

Almost surely, 2^20013311209 is an apocalyptic number.

It is an amenable number.

20013311209 is a deficient number, since it is larger than the sum of its proper divisors (433494943).

20013311209 is a wasteful number, since it uses less digits than its factorization.

20013311209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700187.

The product of its (nonzero) digits is 324, while the sum is 22.

The spelling of 20013311209 in words is "twenty billion, thirteen million, three hundred eleven thousand, two hundred nine".