20021144033220 has 96 divisors (see below), whose sum is σ = 61388025431040. Its totient is φ = 4835155839360.

The previous prime is 20021144033213. The next prime is 20021144033221. The reversal of 20021144033220 is 2233044112002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20021144033221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57497650 + ... + 57844809.

It is an arithmetic number, because the mean of its divisors is an integer number (639458598240).

Almost surely, 2^{20021144033220} is an apocalyptic number.

20021144033220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021144033220 is an abundant number, since it is smaller than the sum of its proper divisors (41366881397820).

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

20021144033220 is a wasteful number, since it uses less digits than its factorization.

20021144033220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115342745 (or 115342743 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20021144033220 its reverse (2233044112002), we get a palindrome (22254188145222).

The spelling of 20021144033220 in words is "twenty trillion, twenty-one billion, one hundred forty-four million, thirty-three thousand, two hundred twenty".