20020102020 has 192 divisors, whose sum is σ = 69420153600. Its totient is φ = 4760156160.

The previous prime is 20020102019. The next prime is 20020102061. The reversal of 20020102020 is 2020102002.

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 = 20020101993 and 20020102011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 117030 + ... + 231810.

It is an arithmetic number, because the mean of its divisors is an integer number (361563300).

Almost surely, 2^20020102020 is an apocalyptic number.

20020102020 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 20020102020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34710076800).

20020102020 is an abundant number, since it is smaller than the sum of its proper divisors (49400051580).

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

20020102020 is a wasteful number, since it uses less digits than its factorization.

20020102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114835 (or 114827 counting only the distinct ones).

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

Adding to 20020102020 its reverse (2020102002), we get a palindrome (22040204022).

The spelling of 20020102020 in words is "twenty billion, twenty million, one hundred two thousand, twenty".