20011320433 has 8 divisors (see below), whose sum is σ = 21792796200. Its totient is φ = 18264436608.

The previous prime is 20011320383. The next prime is 20011320437. The reversal of 20011320433 is 33402311002.

It can be written as a sum of positive squares in 4 ways, for example, as 804686689 + 19206633744 = 28367^2 + 138588^2 .

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 20011320433 - 2²¹ = 20009223281 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 20011320433.

It is not an unprimeable number, because it can be changed into a prime (20011320437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8646778 + ... + 8649091.

It is an arithmetic number, because the mean of its divisors is an integer number (2724099525).

Almost surely, 2^20011320433 is an apocalyptic number.

It is an amenable number.

20011320433 is a deficient number, since it is larger than the sum of its proper divisors (1781475767).

20011320433 is a wasteful number, since it uses less digits than its factorization.

20011320433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17295971.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20011320433 its reverse (33402311002), we get a palindrome (53413631435).

The spelling of 20011320433 in words is "twenty billion, eleven million, three hundred twenty thousand, four hundred thirty-three".