20002200020020 has 12 divisors (see below), whose sum is σ = 42004620042084. Its totient is φ = 8000880008000.

The previous prime is 20002200019903. The next prime is 20002200020071. The reversal of 20002200020020 is 2002000220002.

It can be written as a sum of positive squares in 2 ways, for example, as 10436763437604 + 9565436582416 = 3230598^2 + 3092804^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20002200019979 and 20002200020006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500055000481 + ... + 500055000520.

It is an arithmetic number, because the mean of its divisors is an integer number (3500385003507).

Almost surely, 2^{20002200020020} is an apocalyptic number.

20002200020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002200020020 is an abundant number, since it is smaller than the sum of its proper divisors (22002420022064).

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

20002200020020 is a wasteful number, since it uses less digits than its factorization.

20002200020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000110001010 (or 1000110001008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

Adding to 20002200020020 its reverse (2002000220002), we get a palindrome (22004200240022).

The spelling of 20002200020020 in words is "twenty trillion, two billion, two hundred million, twenty thousand, twenty".