220020001020 has 144 divisors (see below), whose sum is σ = 671398640640. Its totient is φ = 58320662400.

The previous prime is 220020001013. The next prime is 220020001021. The reversal of 220020001020 is 20100020022.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 220020000993 and 220020001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020001021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34596601 + ... + 34602959.

It is an arithmetic number, because the mean of its divisors is an integer number (4662490560).

Almost surely, 2^220020001020 is an apocalyptic number.

220020001020 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 220020001020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335699320320).

220020001020 is an abundant number, since it is smaller than the sum of its proper divisors (451378639620).

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

220020001020 is a wasteful number, since it uses less digits than its factorization.

220020001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7496 (or 7491 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 220020001020 its reverse (20100020022), we get a palindrome (240120021042).

The spelling of 220020001020 in words is "two hundred twenty billion, twenty million, one thousand, twenty".