20000100221020 has 24 divisors (see below), whose sum is σ = 42000327784800. Its totient is φ = 8000017741632.

The previous prime is 20000100220999. The next prime is 20000100221027. The reversal of 20000100221020 is 2012200100002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20000100220988 and 20000100221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000100221027) 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, 7246926 + ... + 9618634.

It is an arithmetic number, because the mean of its divisors is an integer number (1750013657700).

Almost surely, 2^{20000100221020} is an apocalyptic number.

20000100221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20000100221020 is an abundant number, since it is smaller than the sum of its proper divisors (22000227563780).

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

20000100221020 is a wasteful number, since it uses less digits than its factorization.

20000100221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793357 (or 2793355 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20000100221020 its reverse (2012200100002), we get a palindrome (22012300321022).

The spelling of 20000100221020 in words is "twenty trillion, one hundred million, two hundred twenty-one thousand, twenty".