20045543311 has 4 divisors (see below), whose sum is σ = 20123541792. Its totient is φ = 19967544832.

The previous prime is 20045543263. The next prime is 20045543333. The reversal of 20045543311 is 11334554002.

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

It is a cyclic number.

It is not a de Polignac number, because 20045543311 - 2¹³ = 20045535119 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 20045543311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045543411) 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, 38998855 + ... + 38999368.

It is an arithmetic number, because the mean of its divisors is an integer number (5030885448).

Almost surely, 2^20045543311 is an apocalyptic number.

20045543311 is a deficient number, since it is larger than the sum of its proper divisors (77998481).

20045543311 is an equidigital number, since it uses as much as digits as its factorization.

20045543311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77998480.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 20045543311 in words is "twenty billion, forty-five million, five hundred forty-three thousand, three hundred eleven".