20021022220220 has 192 divisors, whose sum is σ = 49176082029312. Its totient is φ = 6705192960000.

The previous prime is 20021022220201. The next prime is 20021022220231. The reversal of 20021022220220 is 2202222012002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1390245020 + ... + 1390259420.

It is an arithmetic number, because the mean of its divisors is an integer number (256125427236).

Almost surely, 2^{20021022220220} is an apocalyptic number.

20021022220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021022220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24588041014656).

20021022220220 is an abundant number, since it is smaller than the sum of its proper divisors (29155059809092).

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

20021022220220 is a wasteful number, since it uses less digits than its factorization.

20021022220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15592 (or 15590 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 20021022220220 its reverse (2202222012002), we get a palindrome (22223244232222).

The spelling of 20021022220220 in words is "twenty trillion, twenty-one billion, twenty-two million, two hundred twenty thousand, two hundred twenty".