20022101220020 has 12 divisors (see below), whose sum is σ = 42046412562084. Its totient is φ = 8008840488000.

The previous prime is 20022101219957. The next prime is 20022101220029. The reversal of 20022101220020 is 2002210122002.

It can be written as a sum of positive squares in 2 ways, for example, as 15258367190416 + 4763734029604 = 3906196^2 + 2182598^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20022101219977 and 20022101220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20022101220029) 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, 500552530481 + ... + 500552530520.

It is an arithmetic number, because the mean of its divisors is an integer number (3503867713507).

Almost surely, 2^{20022101220020} is an apocalyptic number.

20022101220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022101220020 is an abundant number, since it is smaller than the sum of its proper divisors (22024311342064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20022101220020 is a wasteful number, since it uses less digits than its factorization.

20022101220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001105061010 (or 1001105061008 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20022101220020 its reverse (2002210122002), we get a palindrome (22024311342022).

The spelling of 20022101220020 in words is "twenty trillion, twenty-two billion, one hundred one million, two hundred twenty thousand, twenty".