20012220209982 has 128 divisors (see below), whose sum is σ = 55191517774848. Its totient is φ = 4668455347200.

The previous prime is 20012220209981. The next prime is 20012220210163. The reversal of 20012220209982 is 28990202221002.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20012220209982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012220209981) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 44805319 + ... + 45249762.

It is an arithmetic number, because the mean of its divisors is an integer number (431183732616).

Almost surely, 2^{20012220209982} is an apocalyptic number.

20012220209982 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20012220209982 is an abundant number, since it is smaller than the sum of its proper divisors (35179297564866).

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

20012220209982 is a wasteful number, since it uses less digits than its factorization.

20012220209982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90055154.

The product of its (nonzero) digits is 41472, while the sum is 39.

It can be divided in two parts, 20012220 and 209982, that added together give a palindrome (20222202).

The spelling of 20012220209982 in words is "twenty trillion, twelve billion, two hundred twenty million, two hundred nine thousand, nine hundred eighty-two".