20200102020 has 216 divisors, whose sum is σ = 72343462464. Its totient is φ = 4548120192.

The previous prime is 20200102019. The next prime is 20200102031. The reversal of 20200102020 is 2020100202.

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 = 20200101993 and 20200102011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 573849 + ... + 608031.

Almost surely, 2^20200102020 is an apocalyptic number.

20200102020 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 20200102020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36171731232).

20200102020 is an abundant number, since it is smaller than the sum of its proper divisors (52143360444).

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

20200102020 is a wasteful number, since it uses less digits than its factorization.

20200102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34279 (or 34267 counting only the distinct ones).

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

Adding to 20200102020 its reverse (2020100202), we get a palindrome (22220202222).

The spelling of 20200102020 in words is "twenty billion, two hundred million, one hundred two thousand, twenty".