10001020020 has 96 divisors (see below), whose sum is σ = 28643328000. Its totient is φ = 2606120064.

The previous prime is 10001019983. The next prime is 10001020031. The reversal of 10001020020 is 2002010001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 10001019990 and 10001020008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2081581 + ... + 2086379.

It is an arithmetic number, because the mean of its divisors is an integer number (298368000).

Almost surely, 2^10001020020 is an apocalyptic number.

10001020020 is a gapful number since it is divisible by the number (10) 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 10001020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14321664000).

10001020020 is an abundant number, since it is smaller than the sum of its proper divisors (18642307980).

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

10001020020 is a wasteful number, since it uses less digits than its factorization.

10001020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597 (or 5595 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 10001020020 its reverse (2002010001), we get a palindrome (12003030021).

The spelling of 10001020020 in words is "ten billion, one million, twenty thousand, twenty".