20001100220020 has 48 divisors (see below), whose sum is σ = 44542199999808. Its totient is φ = 7518115422720.

The previous prime is 20001100219999. The next prime is 20001100220051. The reversal of 20001100220020 is 2002200110002.

It is a super-2 number, since 2×20001100220020² (a number of 27 digits) contains 22 as substring.

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 = 20001100219979 and 20001100220006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45525366 + ... + 45962605.

It is an arithmetic number, because the mean of its divisors is an integer number (927962499996).

Almost surely, 2^{20001100220020} is an apocalyptic number.

20001100220020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001100220020 is an abundant number, since it is smaller than the sum of its proper divisors (24541099779788).

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

20001100220020 is a wasteful number, since it uses less digits than its factorization.

20001100220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91488640 (or 91488638 counting only the distinct ones).

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

Adding to 20001100220020 its reverse (2002200110002), we get a palindrome (22003300330022).

The spelling of 20001100220020 in words is "twenty trillion, one billion, one hundred million, two hundred twenty thousand, twenty".