20020221333545 has 12 divisors (see below), whose sum is σ = 24388188563844. Its totient is φ = 15777129630240.

The previous prime is 20020221333523. The next prime is 20020221333577. The reversal of 20020221333545 is 54533312202002.

It can be written as a sum of positive squares in 2 ways, for example, as 3980260413481 + 16039960920064 = 1995059^2 + 4004992^2 .

It is not a de Polignac number, because 20020221333545 - 2⁸ = 20020221333289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445961546 + ... + 446006435.

It is an arithmetic number, because the mean of its divisors is an integer number (2032349046987).

Almost surely, 2^{20020221333545} is an apocalyptic number.

It is an amenable number.

20020221333545 is a deficient number, since it is larger than the sum of its proper divisors (4367967230299).

20020221333545 is an frugal number, since it uses more digits than its factorization.

20020221333545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891968120 (or 891968053 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

Adding to 20020221333545 its reverse (54533312202002), we get a palindrome (74553533535547).

The spelling of 20020221333545 in words is "twenty trillion, twenty billion, two hundred twenty-one million, three hundred thirty-three thousand, five hundred forty-five".