20445550303111 has 4 divisors (see below), whose sum is σ = 20445805962072. Its totient is φ = 20445294644152.

The previous prime is 20445550303109. The next prime is 20445550303121. The reversal of 20445550303111 is 11130305554402.

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 20445550303111 - 2¹ = 20445550303109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445550303121) 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, 127709485 + ... + 127869478.

It is an arithmetic number, because the mean of its divisors is an integer number (5111451490518).

Almost surely, 2^{20445550303111} is an apocalyptic number.

20445550303111 is a deficient number, since it is larger than the sum of its proper divisors (255658961).

20445550303111 is an equidigital number, since it uses as much as digits as its factorization.

20445550303111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255658960.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 20445550303111 its reverse (11130305554402), we get a palindrome (31575855857513).

The spelling of 20445550303111 in words is "twenty trillion, four hundred forty-five billion, five hundred fifty million, three hundred three thousand, one hundred eleven".