20001002001020 has 24 divisors (see below), whose sum is σ = 42008504310864. Its totient is φ = 7999181732096.

The previous prime is 20001002001011. The next prime is 20001002001023. The reversal of 20001002001020 is 2010020010002.

It is a junction number, because it is equal to n+sod(n) for n = 20001002000989 and 20001002001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001002001023) 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, 76057229 + ... + 76319748.

It is an arithmetic number, because the mean of its divisors is an integer number (1750354346286).

Almost surely, 2^{20001002001020} is an apocalyptic number.

20001002001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001002001020 is an abundant number, since it is smaller than the sum of its proper divisors (22007502309844).

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

20001002001020 is a wasteful number, since it uses less digits than its factorization.

20001002001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152383549 (or 152383547 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 20001002001020 its reverse (2010020010002), we get a palindrome (22011022011022).

The spelling of 20001002001020 in words is "twenty trillion, one billion, two million, one thousand, twenty".