20101010020 has 96 divisors (see below), whose sum is σ = 52933886208. Its totient is φ = 6241577472.

The previous prime is 20101010003. The next prime is 20101010021. The reversal of 20101010020 is 2001010102.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a junction number, because it is equal to n+sod(n) for n = 20101009985 and 20101010012.

It is not an unprimeable number, because it can be changed into a prime (20101010021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7734 + ... + 200653.

It is an arithmetic number, because the mean of its divisors is an integer number (551394648).

Almost surely, 2^20101010020 is an apocalyptic number.

20101010020 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 20101010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26466943104).

20101010020 is an abundant number, since it is smaller than the sum of its proper divisors (32832876188).

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

20101010020 is a wasteful number, since it uses less digits than its factorization.

20101010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208469 (or 208467 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20101010020 its reverse (2001010102), we get a palindrome (22102020122).

The spelling of 20101010020 in words is "twenty billion, one hundred one million, ten thousand, twenty".