20002220020 has 72 divisors (see below), whose sum is σ = 44058792960. Its totient is φ = 7627160640.

The previous prime is 20002219969. The next prime is 20002220057. The reversal of 20002220020 is 2002220002.

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 = 20002219979 and 20002220006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3287341 + ... + 3293419.

It is an arithmetic number, because the mean of its divisors is an integer number (611927680).

Almost surely, 2^20002220020 is an apocalyptic number.

20002220020 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 20002220020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22029396480).

20002220020 is an abundant number, since it is smaller than the sum of its proper divisors (24056572940).

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

20002220020 is a wasteful number, since it uses less digits than its factorization.

20002220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6445 (or 6420 counting only the distinct ones).

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

Adding to 20002220020 its reverse (2002220002), we get a palindrome (22004440022).

The spelling of 20002220020 in words is "twenty billion, two million, two hundred twenty thousand, twenty".