20001102020020 has 24 divisors (see below), whose sum is σ = 45820706446368. Its totient is φ = 7273128007200.

The previous prime is 20001102019933. The next prime is 20001102020047. The reversal of 20001102020020 is 2002020110002.

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 = 20001102019979 and 20001102020006.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45457049826 + ... + 45457050265.

It is an arithmetic number, because the mean of its divisors is an integer number (1909196101932).

Almost surely, 2^{20001102020020} is an apocalyptic number.

20001102020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001102020020 is an abundant number, since it is smaller than the sum of its proper divisors (25819604426348).

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

20001102020020 is a wasteful number, since it uses less digits than its factorization.

20001102020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90914100111 (or 90914100109 counting only the distinct ones).

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

Adding to 20001102020020 its reverse (2002020110002), we get a palindrome (22003122130022).

The spelling of 20001102020020 in words is "twenty trillion, one billion, one hundred two million, twenty thousand, twenty".