10001002020 has 24 divisors (see below), whose sum is σ = 28002805824. Its totient is φ = 2666933856.

The previous prime is 10001002009. The next prime is 10001002027. The reversal of 10001002020 is 2020010001.

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 not an unprimeable number, because it can be changed into a prime (10001002027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83341624 + ... + 83341743.

It is an arithmetic number, because the mean of its divisors is an integer number (1166783576).

Almost surely, 2^10001002020 is an apocalyptic number.

10001002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10001002020 is an abundant number, since it is smaller than the sum of its proper divisors (18001803804).

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

10001002020 is a wasteful number, since it uses less digits than its factorization.

10001002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166683379 (or 166683377 counting only the distinct ones).

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

Adding to 10001002020 its reverse (2020010001), we get a palindrome (12021012021).

The spelling of 10001002020 in words is "ten billion, one million, two thousand, twenty".