20201100010020 has 120 divisors (see below), whose sum is σ = 65415844209408. Its totient is φ = 5213187086400.

The previous prime is 20201100009973. The next prime is 20201100010043. The reversal of 20201100010020 is 2001000110202.

It is a super-2 number, since 2×20201100010020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20201100009984 and 20201100010011.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 201075826 + ... + 201176265.

Almost surely, 2^{20201100010020} is an apocalyptic number.

20201100010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20201100010020 is an abundant number, since it is smaller than the sum of its proper divisors (45214744199388).

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

20201100010020 is a wasteful number, since it uses less digits than its factorization.

20201100010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402252143 (or 402252132 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20201100010020 its reverse (2001000110202), we get a palindrome (22202100120222).

The spelling of 20201100010020 in words is "twenty trillion, two hundred one billion, one hundred million, ten thousand, twenty".